Upgraded versionAGPtek Wireless Rechargeable LCD digital Dog Training Shock Collar with 100LV of Shock and Vibration, Remote Control (Collar Waterproof) SIMPLE DESIGN REMOTE CONTROLProvides a professional 100 level shock and 100 level Vibration with Rechargeable LCD digital remote control electric training Collar. STOPS UNWANTED BAD BEHAVIORSFeatures strong vibrate and shocks to eliminate all bad behaviors. SAFE AND EFFECTIVEVery humane collar, strong vibration stops dog's bad behavior 99% of the time. LEADING TO A LONG SERVICE LIFElifeRechargeable remote transmitter and collar-receiver; High quality regulator chip in the collar ensures the high endurance of its internals, leading to a long service life. FITS ALL DOGS The Collar length can be adjustable from 12 inches to 22 inches. *The system can be used for 1 or 2 receivers.(The additional receiver must be the same type as your previous one and purchased from us)