Vastar Remote Dog Training Collar Rechargeable, for 15 to 100 lbs Breed Vibration/Shock E-Collar Advanced RF434Mhz Technology boosts range up to 330 yards. Built-in high capacity lithium rechargeable batteries (500mAh for transmitter and 240mAh for receiver) 4 modes: static shock, vibration, beep and light. 100 levels of static shock and vibration stimulation. Fits all dogs. From 15 to 100 lbs with a TPU collar size from 7 to 27 inches long. With extra necessary accessory to turn on the reset button.