YiHorn 300 Meters Waterproof LCD Electric Shock Anti-bark Pet Dog Training Collar with Remote Electric Bark Device E-Collar for Training Dog Obedience (Black) This dog trainer is useful for your pets to correct bad behaviors, especially for bark control With 3 training modes: static shock(1-16 level), vibration(1-16 level) and beep modes, wide range for your choice; Working distance: 300m; Big LCD screen with blue backlight;4*AAA sized batteries inside for transmitter and receiver The training collar can train 2 pets with 1 transmitter, but you need one more receiver; The transparent accessory helps to test whether static shock mode is working The collar is adjustable, suitable for different pets; Big LCD screenwith blue backlight makes it convenient to use at night; Water resistance makes it safe to use when raining Note: please adjust the transmitter to the right level for the best use, otherwise it will not be very effective for training your dog; Unbeatable Guarantee - Put your worries aside! If there is any problem with it,you can just take advantage of our lifetime warranty,we could fix the problem for you with free charger, your satisfaction is our final goal!