Specification: Item: Waterproof Remote Control Dog Trainer Collar Collar size: max adjustable length is up to 67cm Range: About 800 Meters (without disturb) AC Input: 100 - 240V, 50 / 60Hz DC Output: 5V, 0.5A Remote control battery voltage: 3.7V Receiver waterproof level: IP67 Battery type: lithium-ion battery (built-in) Receiver Transmitter charging time: 4 hours Receiver Transmitter standby time: about a week Feature: 1, Receiver IP7 degree waterproof, high quality TPU material, can swim, take a bath, dive. 2, With blue backlight screen: can be used at night . 3, Product Certification: CE / FCC / ROHS. 4, 3 training modes: shock/vibration/sound. 5, Long-distance remote control: the remote distance is 800m (without any disturbance) . 6, Adjustable levels: levels of vibration and shock are adjustable from 1 to 99, and you are advised to try levels gradually to find the proper one when using this pet training system for the first time 7, Auto power save: automatic standby mode and memory functions. 8, 3 channels: there are 3 signal channels on the remote transmitter, and it can control 3 receivers of the same model. Note: 1. Avoid leaving the collar on the dog for more than 8 hours per day. 2. If it's possible, re-position the collar on the pet's neck every 2 hours. 3. Check the fit of the collar to prevent excessive pressure. 4. Each inspected product will only with little power before on shelf, please recharge the battery when the first time use. 5. If you find your trainer only beep not shock and vibrate, please check whether the number display on LCD is 000, you can adjust the number with your requirement. 6. For prolonging the life time of your battery, please recharge the battery in time before low power. 7,Observe the dog's reaction and make sure the training intensity not too much. Before using the shock mode to your pet, you should try vibration to your pet first.