Function: 100% Brand new in box & Tested Fully functional multi-dog system; Train up to 3 dogs independently from the same transmitter; Audible tones of different frequencies and 4 levels of continous static stimulation(up to 3 seconds) Water resistant transmitter and receivers; Up to 200 metre range; Transmission frequency: 433.92MHz; Low battery indicators on transmitter and receivers. Safe, humane, robust and highly efficient electronic product for pet education Allow you to take control of your dog's behavior problem immediately or training your dog in smart way Train up to 3 dogs independently and simultaneously by 1 Remote The collar is combination of micro static shock impulse and audible sound 4 levels tones of different frequencies and 4 levels of continuous static stimulation (up to 3 seconds) find the best fit for your dogs temperament and the type of training you do hand held easy-to-use remote control works up to 200 meters away Collar length adjustable from 20 to 60 cm for difference size of dog The static impulses can penetrate the hair of pet within 6mm thick; It is unnecessary to let the discharging point touch the skin of the pet. Therefore it is safe to the pet Build communication between you and your dog. Let dogs know what behaviors are wrong and you don't like Waterproof Min Qty: 40PCS QTY/CTN: 40PC/CTN Carton size: 60cm*28.5cm*38cm Product weight: 240G/PC G. W. (KG): 11KG N. W. (KG): 9.6KG