WOLFWILL 800 Yards Dog Training Collar Waterproof & Rechargeable E Collar with Beep Automation Adjustable Vibration (1*collar) remote trainers you can use it to you can use it to check the Receiver whether work and the intensity of the stimulation Packaging Content: 1x Receiver 1x Remote transmitter 1x Adjustable Collar 1x Charging adapter 1x USB charging cable 1x Wrist Strap 1x Test light 1x User manual 4x Contact points the stimulation is limited to 20 seconds and automatically shuts off for one minute before repeating stimulation for another two 20 seconds Waterproof & Rechargeable E Collar with Beep Automation Adjustable Vibration (1*collar)