DESC: Know when your dog is pointing birds, even when you can't see it. The SportDog DSL-400 beeper locator e-collar is the smallest and lightest beeper on the market. You can choose from three selectable beeper modes: ,,- Silent run-beep every second on point ,,- Beep every 5 seconds on run and beep every second on point ,,- Beep every 10 seconds on run and beep every second on point ,, ,, Features: ,, ,, Volume control ,, 4 selectable beeper sounds: Standard Beep, Hawk Scream, Bob White recall, and Trill ,, Audible out to 400 yards ,, Low battery detect ,, Waterproof and rugged ,, Backed by a Lifetime Limited Warranty - Hunting > Dog Training > Electronic Collars