1.Solar powered,Waterproof 2.repel rodent,snake,lizard 3.CE&RoHS&FCC 4.Effective range:700 square meters 5.Patent Solar Pest repeller (GH-318)Theory:It's emit a plusing vibration by motor,Pest thinks earth quake and danger is coming then escape away immediately. Theory Vibration Material ABSSolar panel4V45MA AmorphousRechargeable batteryNI-CD/NI-MHPest typeSnake,mole,lizardEffective range700 ...