VEVOR 20W 12V Solar Panel Battery Charger, Solar Battery Trickle Charger Maintainer with Built-in Controller & Pole Mount Bracket, IP65 Waterproof for Gate Fence Farm Lawn (Fits 1.57" - 2.68" Poles)Smart Charging ControllerBuilt to LastEasy to ConnectWide ApplicationsHigher Conversion EfficiencyHigh CompatibilityCompatible Battery Voltage: 12V,Solar Panel Dimensions: 20.5 x 14.57 x 8.46 in / 521 x 370 x 215 mm,Maximum Power: 20W,Solar Cell: Monocrystalline Silicon,Waterproof Rating: IP65,Color: White,Controller Type: Built-in Controller,Item Model Number: 20W,Surface Material: High-Transparency Tempered Glass,Net Weight: 7.06 lbs / 3.2 kg