Aetertek AT-918C Dog Training System Train your dog via auto-bark or remote control. Switch auto-bark on to control barking while you are away from home and switch it off when you want to control your dog at the park. Features include multi-functional modes (a warning beep tone, vibration mode) and 9 levels of static shock. You can train 1 or 2 dogs via the same handset (see buying options below). Like all Aetertek products, the design of the AT-918C is durable and user-friendly. Features: Suits medium & large dogs Activated automatically by the dog barking Remote control Water Resistant (IP-5) against light water streams 9 Levels of correction Long battery life- up to 3 days Range up to 550m 1& 2 Dog Version Available Receiver is 7.5cm long, 4cm wide and 3cm deep 1 Dog Version 1 x Transmitter 1 x Antenna 1 x Receiver 1 x Collar strap 1 x Charger 1 x Test bulb 1 x Carrying case 1 x User manual 2 Dog Version 1 x Transmitter 1 x Antenna 2 x Receivers 2 x Collar straps 1 x Charger 1 x Test bulb 1 x Carrying case 1 x User manual Optimal Battery Use for the AETERTEK AT-918C Dog Remote Training Collar+Auto Bark For the first three charges the battery needs to be charged for three hours to condition the battery. However please avoid overcharging the device ongoing as this will impact the life of the battery. You will receive approximately 3 days of battery life on the basis of a maximum 12 hours usage per day. eDog New Zealand recommends using the device only as needed by your dog.