1.4 Functions: Range finding,vibration, shock, Tone. 2.Range up to 660 yards.Able to fit small, medium and large dogs.Waterproof collar receiver. 3.LCD screen displays exact level of stimulation even in dark or low light conditions.3-bar battery life indicator. 4.Three colours of LCD screen backlit(Blue/Red/Pink). 5.Rechargeable transmitter and collar receiver.Products can be used after charging, without any other operations.Charging cable is the Android general Microusb cable.