4pcs? of blade every edge can used if?one damaged by hard stone or other objectsRear wheel it heavier than S510,can keep from slippery when running on slopes and hills.Charging connection S520 has a better connectionfront wheel? it is softer than the old one ,against the vibration when working , with stainess steel holder ,against rusting

2-wheel drive cleans pools up to 16’ x 32’Patented self-adjusting turbine vanes provide maximum power at any flow and allow passage of large debrisPatented tire treads for enhanced climbing and obstacle managementPatented adjustable roller skirt optimizes suction on uneven surfacesMultiple pre-programmed internal steering sequences ensure full pool coverage

Polaris Vac-Sweep 280 pressure side pool cleanerWorks in all in-ground pools; requires Polaris booster pumpPalletized in multiples of 16 units ;TailSweep PRO Compatibility-YESReady to connect to 1.5-inch dedicated pressure cleaner lineIncludes 31-feet of feed hose.Vacuum Inlet:2.25 inches

Massive 400 square inch top-loading cartridge filter . The largest ever in a pool robot.Hypergrip Continuous Rubber Tracks for superior wall climging - leave wheeled cleaners in it's wake.Variable Micron Filtration traps the smallest fine debris and even algaeSmartNav 2.0 Efficient Robotic Navigation. Gone are the days of your robot wondering around aimlessly.Hyperbrush Dual Scrubbing Brushes + Power Jet 3D Vectored Thrust for a deeper clean and improved mobility

Scrubbing HyperBrush removes the toughest ontaiminants stuck to the pool wall + HyperGrip Rubber Tracks for superior wall climbingFor stubborn, stuck-on contaminants, traditional vacuum pool cleaners just don’t cut it. That’s why the engineers at Dolphin added the HyperBrush to the Cayman. Spinning twice as fast as standard pool brushes, the HyperBrush dislodges stubborn contaminants for a deep clean of your pool’s surfaces. Cleaning struggles like cloudy water, algae bloom, and build-up may be due to the fact that your cleaning regimen only treats the symptoms, rather than attacking the source of the problem.With its top-access filter compartment, simply lift the Cayman’s top hatch and grab the cartridge handle for easy and mess-free removal. No more fiddling with cumbersome debris bags.Traditional wheeled robotic pool cleaners struggle with slipping as they clean. A layer of water can get in between the wheels and the pool surface, causing the robot to lose traction. This lost traction is a big blow to efficiency, and adds up in the long run for the pool owner. Dolphin’s engineers hold themselves to the highest standards of efficiency, and this slipping problem just wouldn’t do for the all-new Cayman.SmartNav 2.0 Robotic Scanning. 2 Year Warranty

Polaris Vac-Sweep 165 pressure side pool cleanerWorks in all in-ground vinyl or fiberglass poolsOperates on pool circulation pumpReady to connect to 1.5-inch threaded return line.Includes 32-feet of float hoseKindly, read through installation manual (PDF) under product description for installation and trouble shooting steps

Quiet, powerful suction cleaner; works with low-speed pumps for maximum efficiency.Devours small and medium-sized debris and cleans floor, walls and steps of your entire pool.FlowKeeper Valve automatically regulates water flow to maintain peak cleaning performance even with lower horsepower pumps.Wheel Deflector for movement around tight corners.Scuff-resistant Long-Life Hoses eliminate scuffs on all pool surfaces.36-Fin Disc increases adhesion to pool surface and avoids getting hung-up on lights, drains covers, fittings and other pool features.Durable Long-Life Diaphragm with reliable, one-moving-part-technology

Unique turbine/gearing system provides constant balanced water flow assuring quiet operation and gentle movement across the pool bottomAdvanced, contoured head design allows the steering pattern to be completed in minimal timeInstalls in less than 10 minutes, without toolsDeluxe bumper ring minimizes friction for easy movement away from walls and resumption of the programmed steering pattern1 year warranty

Cleaning made convenient. Set your Dolphin’s weekly scheduler to automatically clean for you- every day, every other day, or every 3rd day.Powerful dual scrubbing brushes forcefully attack tough dirt and debris on the floor and walls. Large top-load cartridge filters capture leaves and fine debris for an optimal clean swimming pool in 2 hours.CleverClean delivers a smart and efficient clean using advanced algorithms for complete pool coverage. Anti-tangle patented swivel cable allows your Dolphin to move around your pool with ease.Peace of mind. This easy-to-use single button operation in-ground pool cleaner is backed by an extended 2.5 year manufacturer’s assurance. Ideal for swimming pools up to 50 feet.Quick payback. 8X more energy efficient than suction and pressure cleaners saving you energy with every pool cleaning!

10 hoses included for up to 30' pool. Ideal for cleaning bottom surface and wall; do not apply for cleaning stepsRequire at least a 1 hp swimming pool pump or 1600 GHP to function properly.No tools required and no electricity needed; Attaches to your existing filtration system1 Year Warranty for Parts Replacement (For under purchased from Amazon.com Prime and Ihubdeal ONLY )Cleaner should be moving about the pool at a rate of 8 to 12 feet per minute

Professional, powerful automatic suction pool vacuum cleaner that thoroughly removes all pool debris. Durable and efficient pool vacuum cleaning system that's easy to install, as no tools are required.Vacuum cleans your entire pool, as it quickly removes debris as it moves across floors, climbs up walls and over steps without getting stuck.For in-ground, above-ground and self supporting swimming pools (excluding soft wall pools). Only requires a 3/4 hp (550w) pump or a minimum flow of 6 meters cubed/hr (1600gal/hr) to operate.Includes 30 feet of premium spiral wound vacuum hose (12 - 2.5 feet hose sections). The hose sections allow you to customize the hose length to the requirements of your pool.100% Satisfaction Guarantee: Buy with confidence, if you're not satisfied with this item at anytime within one year of purchase, we'll provide a refund or replacement.

Cleans the floor, vacuum dirt, scrubs the wall and waterline of pools up to 20’ x 40’ x 8’ deep. Cleans your pool from top to bottom. With a built in A.I. control microprocessor, it is plug and play, drop and go. No adjustment needed. Fast drain door allows water drained quickly making removal from pool easy.No hoses hookups or pumps required. Extra large fine 20 micro filter bag included. Unique vortex suction gobble down the dirt in one run and remains strong vacuum. Removes large as big as acorn as well as fine dirt, sand and algae. Nylon framed filter bag is easy to clean and won’t break. Dump the trash, hose clean and reload in minutes.Runs separately from the pool's filtration system reducing the frequency of filter backwash cycles. Simple one switch power supply control included. ETL, CSA and CE approved. Automatic shut off in 2 hours to minimize wear and tear. Extra long 60ft floating cord. Patented NO-TWIST swivel also included. Greatly minimize cord tangling which is #1 issue of most robotic pool cleaner. Swim more, work less.Intelligent navigation program, zero radius turning helps to clean corners and maneuver steps. It does not have to bump a wall to change direction. Easy on your liner. Dual scrubbing brushes attack tough dirt and debris. Quad foamed ring for superior wall climbing includedCaddy also included as an extra bonus

Brand Name:DEVVISCutting Width:21cmCertification:EMC,Other,cePower Type:ElectricityFeature:Self Propelled,Anti-Slip,Antistall,4-StrokeForward Speed:35m/minModel Number:E1800Type:Robotic MowersSmartphone App Control :YesWater-Proofed charger:YesAuto Recharged:YesRange Function :YesSubarea setting:YesMowing schedule:YesIntelligent Spiral /Go Straight :YesLCD display :YesPassword-Anti theft :YesBump sensor/ Rain sensor:YesOverload protect:YesMower Size:52*39*27cm(LWH)Charging Sation :48.2*15cm(LWH)Cutting height:2.5-5.5cmWorking capacity:1500m2+_20%Coverage (for one charging):500m2+_20%Battery :4.4ah lithium battery