Portable wireless DVR Wireless 2.4GHz receiver Multimedia player MIC voice recording Built-in 64MB flash with SD card port USB to PC intercommunication Rechargeable battery Camera lens is apart from camera body which is suitable for all direction monitoring 360 Omni-directional monitoring Item R88 specifications: Receiver frequency: CH1: 2,414MHz CH2: 2,432MHz CH3: 2,450MHz CH4: 2,468MHz Sensitivity: 90dBm Recording audio: WAV Samples per second: 64kHz AV recording: MPEG-4, definition: 640 x 480, 320 x 240, and 160 x 128 pixels Media player: 2.5-inch TFT LCD, 960 x 240 pixels high definition Movie: MPEG-4, AVI and ASF Audio: MP3 and WAV Picture: supports JPEG picture Input audio: stereo output range: 20Hz to 20kHz Video: 75Ω/1.0Vp-p, NTSC/PAL Earphone output: 16Ω/40mW and 32Ω/30mW maximum Built-in speaker: 8Ω/0.5W Memory built-in: 64MB flash support SD card: 8GB Language: simplified Chinese and English Operating system PC: Windows XP Interface: USB 2.0 and USB 1.1 File system FAT32 Power adapter: 110 to 240V AC/5V DC/1,000mA Battery: 3.7V/1,400mAh Lithium battery Working time/charging time about 3.5 hours Wireless video recording time about 3.5 hours Media player: about 3.5 hours Weight net receiver: 110g Battery: 40g Working temperature: -10 to 50°C C 26 (mini camera) TV system: PAL/NTSC Validity pixel: 628 x 586, 510 x 496 pixels Image device: 1/3-inch Omnivision CMOS Horizontal definition: 380TV lines Visual angel of view: 80° (F = 6mm) Minimum illumination: 3Lux (F1.2) Operation temperature: -10 to 50 degree Celsius/14 to 122 degrees Fahrenheit Transmission frequency: ISM 2,400 to 2,483MHz Open transmission distance: 50m/10mW Power adapter: 5V DC/500mA Battery/working time: 3.7V/550mA/4 hours