21 LEVELS OF STIMULATION: This electric collar offers 21 levels of static stimulation with low/medium 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. With our dynamic pricing model, our prices are always competitive. Our prices are some of the lowest that you will find on the internet. Rest assured that you're getting a good deal when purchasing with us.