SportDOG Brand® YardTrainer 100S Remote Trainer - Shock Collar for Stubborn Dogs - Train with Tone, vibrate, or StaticDesigned for dogs that do not respond to lower levels of shock stimulation 100 yard range e collar that supports training 1 dog Choose to train with vibration (buzz), tone (beep), or 8 levels of static simulation (in a higher range than the YT 100) Waterproof and submersible to 25 feet using DryTek technology Lithium ion, rechargeable batteries feature a 2 hour quick charge, and a low battery indicator lets you know when to charge Shock collar fits