Now you can experience the difference a Remote Trainer can make. The Remote Transmitter sends a signal activating your dog's Receiver Collar. He receives a safe but annoying electrical stimulation. He'll quickly learn the association between his behaviour and your training. In no time, you'll have a better behaved pet. For dogs 3.6 kg and up, this unit has a range up to 70 metres, fits neck sizes up to 56 cm, and has 12 adjustable levels of static stimulation plus 2 tone-only training options. For one pet training only, it is water resistant and uses 4 x 3 Volt lithium batteries (included). The battery usually lasts 2 weeks with continuous use and the unit has a low battery indicator. The system includes a receiver and adjustable nylon collar; remote transmitter; 4 x 3-volt lithium batteries; test light tool; wrist strap; and operating and training guide.