The VTech BM5550AU video and audio baby monitor with 2.4GHz FHSS technology for a secure connection and clear sound without interference. The Baby Unit features motorised pan & tilt, auto night vision and digital zoom. It operates on mains power. Comes with 9 soothing sounds with 5 level volume setting. It also has a temperature sensor, speaker/microphone for 2 way communication with the parent unit and it is wall mountable. The Parent Unit has a 5-inch colour display and uses a high capacity rechargeable battery pack for up to 17 hours of active video monitoring time before re-charging. LCD for room temperature monitoring and speaker/microphone for 2-way communication with the baby unit. It has sound activation mode, low battery audible alert and out of range audible alert. The 2-camera system offers single cam, split-view and patrol mode viewing options.