This was a gift and I never used it. 500 YARD RANGE: e-collar that can support training up to 3 dogs with the same remote with purchase of additional collars (SDR-AXS). For dogs 8 pounds or larger with neck sizes 5" - 22". NO LOOK OPERATION: Designed for ease-of-use and no look operation while offering more levels of stimulation which allows for more customized training. TONE, VIBRATE, AND STIM: This electric e collar offers 21 levels of static stimulation with medium/high ranges. Option to train with vibration (buzz) and tone (beep), too. WATERPROOF: Submersible to 25 feet using DryTek technology. RECHARGEABLE BATTERY: Lithium-ion batteries charge in 2 hours and last 50-70 hours per charge. System has low battery indicators. INCLUDES: Remote Transmitter, Receiver on 3/4" Collar Strap, Charging Adaptor, Standard Contact Points, Large Contact Points, Lanyard, Test Light Tool, Operating Guide & Basic Training Manual.