Aetertek AT-919C 2-DOG 1100 YARD ULTRA RANGE REMOTE TRAINING SHOCK COLLAR WITH AUTO ANTI-BARK,RECHARGEABLE AND WATERPROOF Remote training dog collar to train your dog remotely with a range up to 1100 yards (approx. 1000 metres); Adjustable 10 levels of shock to fit the needs of dog training; 9 leves of beep tone; Belt-clip and flashlight feature; One strong vibration, humane effective approach to get your dog's attention or stop barking or other undesirable behaviors; Aut anti bark feature: let the collar control dog's barking automatically when dog is left alone; Rechargeable waterproof receiver; collar strap adjustable from approx 18cm to 60cm (from approx 7.1 to 24);