A 400-yard range gives you plenty of room to work and train your dog. The transmitter and receiver are waterproof and submersible for work in wet conditions and weather. 2.8-oz receiver. 3.2-oz transmitter. 16 levels of continuous stimulation.Eight levels of momentary (Nick) stimulation. Tone button. Transmitter offers 7 selectable modes of operations. This electronic dog training device expands to 3 dogs. Low battery detector feature in both transmitter and receiver. Replaceable, rechargeable NiMH batteries (included). Basic training DVD and manual by Charlie Jurney with tips from Rick Smith help you along with the process. 26"L. Fits up to 23" neck size. Battery charger not included with these electronic dog training devices.