Small & lightweight rechargeable receiver & transmitter but effective for small dogs and cats. * Water-resistant collar receiver(but not waterproof). * LCD display remote for easy control of 1 puppy/cat at a time or 2 puppies/cats at the same time (but only 1 receiver is included). * 350m remote control range.10 levels for shock, beep and vibration function. * Adjustable TPU strap, it will work for small dogs or cats.