The product is a cost-effective wireless digital security system for home use this device adopt dynamic detecting technology SD card recording. It supports single screen and 4 channel's screen display video recording and photos simultaneously. It can record and take photos manually also can record and take photos automatically when there are moving objects; - Suitable for warehouses shopping malls home security care for children and the elderly. - Frequency: 2.4GHz ISM digital public band - Work method: AFH and TDMA - Receiver sensitivity: -90dBm - Work current: - Video output: 1Vp-p CVBS - Video format: Single screen status: 640 x 480@25fps; 4 screen status: 320 x 240 @25fps; - SNR: 46dB - Transmit power: 17dBm - Operating range: Open field: 150~250m - Work current: No night vision: 550mA Max. With night vision: 650mA Max - Battery capacity: 800mAh - Continuous use time: 50~70minutes - Working voltage: DC 5V 1000mA - Operating temperature: 0~50'C - Packing List: - 1 x Receiver - 1 x Camera - 1 x Antenna - 2 x 100~240V 2-round-pin plug power adapter (115cm) - 1 x A/V cable (120cm) - 1 x English manual - 1 x Software CD - 1 x Remote controller (1 x CR2025 button cell included)