DogWatch BigLeash S-15 Remote Dog Training Collar &ndash; Safe and Effective E-Collar with Two-Way Communication up to &frac12; Mile, 15 Adjustable Stimulation Levels Plus Tone and Vibration, Waterproof, Recharge Two-way Communication ( mile range) so you know how far away your dog is. 15 manageable stimulation levels (you dont need 100+), two modes (brief & continuous) plus audible and vibration. LCD display shows battery status, stimulation level and dogs distance from the transmitter. Bright LED nightlights on the receiver turn on-off from the handheld transmitter Long-lasting rechargeable battery in both the handheld transmitter and receiver collar