300M ELECTRONIC SHOCK DOG DOBERMAN TRAINING COLLARS FOR 2 DOGS | PET998DBBMain Features Remote transmitter has a range up to 300 Meters (218 yards / 650ft). 3 training modes: shock(100 levels ), vibration(100 levels ) and beep. Rechargeable remote transmitter. Rechargeable and waterproof receiver, your dog can swim underwater. Convenient, easy-to-read Blue Backlight LCD screen that shows the mode & level Durable and adjustable TPU strap ( lenth from 7 to 26.8 , 18cm to 68cm ). Main body of the transmitter & receiver made of ABS material The system can be used for 1 or 2 Receiver Collars (optional).