USB 2.0 output to PC Supports Windows 2000/XP Bundle with security software Image capture and high-speed MPEG4 real-time recording Supports MSN messenger Built-in microphone for audio monitoring Rechargeable Li-battery in camera for portable monitoring 4-channel available to avoid possible interference Transmission range in open space: up to 100m (330 feet) Specacifications: General: Transmission frequency: ISM 2,400-2,483 MHz Transmission power: 10mW/CE; 2mW/FCC Operating frequency: 2414MHz; 2432MHz; 2450MHz; 2468MHz Unobstructed effective range: 100m(Min.) Modulation mode: FM Operating temperature: -10 to +50(Degree C)/+14 to +122(Degree F) Operating humidity: ≤ 85%RH Camera Imaging sensor type: CMOS Picture total pixels: PAL: 628 x 582 pixels; NTSC: 510 x 492 pixels Minimum illumination: 0Lux Night vision range: 3m Li-battery charge time: 2 hours Working time: 5 hours (IR off)/2 hours (IR on) Bandwidth: 18m Power supply: DC +5V Dimensions (W x D x H): 28 x 90 x 28 mm Weight: 110g Receiver Antenna: 50 ohm SMA Receiving sensitivity: ≤ -85dBm Video output signal level: 1.1Vpp± 0.2Vpp@75 ohm, S/N >38dM Audio output signal level: 3.0Vpp± 1Vpp@600 ohm Video system: NTSC/PAL Consumption current: 190mA(Max.) Power supply: DC +5V Dimensions (W x D x H): 16 x 102 x 80mm Weight: 120 g