Ultracompact yet extremely powerful, this low-to-medium-strength receiver gives you complete control out to 400 yards and fits dogs as small as 10 lbs. Waterproof receiver and water-resistant transmitter use rechargeable NiMH batteries (included). Illuminated LCD screen to see correct setting levels. The receiver has rechargeable receiver with nick, continuous and pager vibration modes. 100 rheostatic levels of correction.