Compact dog device with changeable contact points (long and short), enhanced stimulation levels -18 continuous and 36 momentary -plus tone and vibration, 5 correction configurations, and the ability to train 1, 2 or 3 dogs from up to ¾mile away (with handheld which is sold seperately. The built-in BarkLimiter is adjustable from the handheld (sold separately). The included upland beeper features 4 hunt sounds (includingsilent) and 2 point sounds (including hawk scream) to help locate your dog and know when he’s on point.