... Unlock Door, View Monitor. Talk Button, MIC, LED Indicator, Mini USB Input, Speaker, Volume -/+, Brightness control -/+, Antenna, Power ON/OFF ... Infrared LED lights - Power Source - AC Adapter (100-240V) 50/60Hz - Transmitting Frequency - 2.4GHz - Wireless receiving range - approx. 250 meters (ideal ... ON/OFF Switch - Dimensions: L:127 x W:95 x D:36 (mm) Certification: FCC, CE , ROSH Product Notes: ...