LYD W802AJ4 2.4Ghz (4)Wireless Infrared Color Camera Set with Quad View USB DVR feature. QUAD Display allows viewing of all 4 cameras simultaneously; Record all four cameras in real time without a delay 2000/XP (32 bit) compatible without additional hardware or software Remote Access / Viewing - Watch Your system anywhere in the world over a browser; Email Alert with Image - Send to any PC in the world LED's for SUPER Night Vision - Cameras can be used INDOOR or OUTDOOR (note: cameras require power outlet) Can be used with TV or VCR, all RCA cables and power included; 100M Wireless Distance = 330 feet wireless distance