VINSIC Dog Training Collar, Rechargeable 330 yd Remote Dog Training Shock Collar with Beep, Shock and Vibration Electronic Electric Collar for All Dogs Rechargeable Dog Training Shock Collar, one transmitter to TWO collar receiver. Intelligent and humanized system, helps you to training your dog within a safety yet effective range. Transmitter theoretic standby time: 55 days and continuous work time: 40 days. Receiver theoretic standby time: more than one year. 4 modes: static shock / vibration / beep / light, professional 1-100 level shock and 1-100 level vibration. Set up safety voltage, it will not bring any damage to your dog. Range up to 300 meters remote control distance. Durable and adjustable nylon collar strap (length from 36cm to 60cm). Convenient to encode and operate, one button to switch between Receiver 1 and 2. LED lighting function on the transmitter. Easy-to-read LCD screen. High quality materials: comfortable to the touch with the transmitter. There are two rubber covers on the "reset" & "charging jack", which are designed to be waterproof. Note: please take it off the dog when it is rainy or you wash the dog in case it is broken.