iMeshbean Dog Training Collar With Remote Rechargeable & Rainproof LCD Screen 330 Yard Beep/Vibration/Shock Electric Train Collars For Small,Medium,Large Pets&Dogs(For 1 Dog) The Remote Transmitter & the Collar Receiver can be Rechargeable Effective on dogs: From 10 pounds to 130 pounds Remote Controlled 100 levels of vibration & static Range: 300 Yards; Collar length: can be adjustable from 12"-20" The system can be used for 1 or 2 receivers.(The additional receiver must be the same type as your previous one and purchased from us)