The Dogtra iQ CLiQ is the safest electric collar for the dog. It has a conductive plastic tip to reduce hot spot and metal allergies. The receiver detaches from the collar in case the collar breaks. The receiver is water proof while the transmitter is water resistant. The batteries are lithium ion and can last for up to 88 hours on standby. The iQ CLiQ has a range of up to 100 yards and is expandable to a two dog system. It comes in Black. The transmitter has a built in clicker giving you a free hand to help with training. It has one stimulating function, nick: a pulsating stimulation until the button is released. Adjustable stimulation from 1 to 100, make sure to adjust properly for the animal you are working with. See additional information tab for more information.