Dog Shock Collars, VIYAO Rechargeable 330 yd Remote Electronic Dog Training Bark Collar with Beep, Vibration and Shock E-Collar Dog Shock Collar with 4 modes: vibration, shock, beep and light. 100 levels of accurate static shock and vibration stimulation. Fits all dogs. From 15 to 100 lbs with an adjustable TPU collar size from 7 to 24 inches. Updated version, a safe, humane, and effective alternative to shock collars, train your dog safely and humanely. Quickly synchronize the transmitter with collar receiver, within 10 seconds. Ingenious design over 3000 different identity codes that prevents conflict with other similar devices when no obstacles in between Remote Dog Training Collar with Advanced RF 434Mhz Technology, boosts range up to 330 yards. Rechargeable receiver and transmitter Convenience of operation, easy-to-read LCD screen shows the stimulation.Backlight LCD screen for easy low light condition viewing