The latest in SportDog line of e-collars, the A Series SD-1225 has a compact contoured design. DryTek technology ensures the transmitter and receiver are waterproof and submersible for all-conditions training opportunities. It has a 3/4-mile range and eight levels of momentary and continuous stimulation. It features multiple tone and vibration stimulation options. Expand the system to handle up to three dogs by using additional A Series Receiver collars. The unit operates on a rechargeable lithium battery that recharges in less than two hours. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Electronic Collars.