Zacro 330 yards rechargeable Remote Dog Training Collar for 2 Dogs, Fit for 15 to 100 lbs Breed Vibration and Shock E-Collar Rechargeable and Power Saving; Built-in high capacity lithium rechargeable batteries (500mAh for transmitter and 240mAh for receiver) 4 modes to choose to train your dog: static shock, vibration, beep and light; 100 levels of static shock and vibration stimulation The collar is made in high quality TPU materials; Fits all dogs;From 15 to 100 lbs with an adjustable TPU collar size from 7 to 27 inches long Convenience of operation, easy-to-read LCD screen shows the stimulation; Backlight LCD screen for easy low light condition viewing Easy to operate; Provide with 1 detailed User Manual and 1 customer quick-use-guide