Now you can experience the difference a Remote Trainer can make. The waterproof PetSafe® ST-100-BD Big Dog Remote Trainer, for one dog up to 3.6 kg and up, is easy to use with an advanced digital display that tells you exactly what level of electrical stimulation you are using. Control your pet without a lead within a range of up to 100 metres. The Remote Transmitter sends a signal activating your dog's Receiver Collar from which he receives a safe but annoying static stimulation. There are 16 adjustable levels of static stimulation plus instant +2 boost button and a tone-only button. He'll quickly learn the association between his behaviour and your training; in no time, you'll have a better-behaved pet. The trainer has been proven safe, comfortable and effective for both small and large dog breeds. Using the Remote Trainer consistently and correctly, any basic obedience commands can be taught and many misbehaviours that your pet exhibits can be corrected. It uses 4 x 3 volt lithium batteries (included). The battery usually lasts 2 weeks with continuous use and there is a low battery indicator. The system includes a digital remote transmitter; receiver with adjustable collar for neck sizes up to 71cm; wrist strap and test light tool; 4 x 3-volt lithium batteries; and operating guide.