Homdox 330 Yards Rechargeable Adjustable Pet Training Collars Dog Training Collar with Wireless Remote Rechargeable and waterproof dog training collar. Both transmitter and collar receiver can be charged at the same time, save your time. 330 Yards Blue Backlight Screen Remote Transmitter control electric dog shock collar with 3 modes: shock, vibration, sound. Includes two collar, Remote Transmitter can control up to two dogs. With 100 levels of vibration and static shock you will be able to find the right correction for your pet's personality and size. Featured power saving design with automatic standby and memory function. Fully waterproof receiver,Dog E-collar fits all dogs from 15 to 100 lbs and collar sizes range up to 28.5 inches.