Garmin’s PRO 70 Handheld offers a simple and straightforward method of training your sporting dogs. When linked with a compatible dog device (sold seperatly), the PRO 70 provides 6 levels of continuous stimulation that can be increased for optimized effectiveness, as well as an audible tone setting. . The PRO 70 handheld can connect to up to 6 dog collars, allowing you to train multiple dogs at once (dog devices sold separately), and the simple one-handed operation ensures you never have to take your eyes off your dogs. Features of the PRO 70 Handheld Device: Connects to up to 6 dog devices (dog devices sold separately)6 levels of continuous stimulationSimple one-handed operation Garmin PRO 70 Handheld 010-01201-50