Suitable for all dogs. trains up to 2 dogs with the same transmitter. (need to purchase additional collar) Long and short spray. High and low warning beep. Select your dog with dog selection button. Rechargeable 3.7V Collar 2 PCS of 1.5V AAA battery for remote controller Soft silicon Collar strap LED low power indication.  Red light will flash 1 time per 5 seconds when low spray. Comes with warranty