PVR: Portable 2.4GHz 4-channel palm wireless AV receiver/recorder AVI format recording with high resolution 640 x 480/320 x 240 pixels Real-time stamp on every videos Supports playing MP3/MP4 and picture browse AV input recording function 2.5-inch TFT LCD display screen with high-definition 960 x 240 pixels Built-in 64MB memory block, MMC/SD card extra supported OTG and 2.0 high-speed USB interface supportable Inbuilt high-capacity (2,400mAh) polymer lithium battery/at least last 5h playback Camera: Frequency: 2.4GHz Image sensor: 1/3-inch CMOS Horizontal resolution: 380TVL sharp picture View angle: 62 degrees Mini size camera for observation and portability Built-in rechargeable lithium battery Built-in microphone for audio monitoring Provides images/video compression and storage Motion detecting and hard disk recording Adapted to TV, monitor, and palm LCD Gain control: automatic Transmission range: 100m without block Transmission frequency: ISM 2,400 to 2,483MHz CH1=2,414MHz, CH2=2,432MHz CH3=2,450MHz, CH4=2,468MHz Sound modulation: 6.0MHz Operating temperature: -10 to 50 degree Celsius (14 to 122 degrees Fahrenheit) Operating humidity: ≤85% RH Sensitivity: 4.7V/Lux-sec at 5,600K Gain control: automatic Transmission range: 100m without block Imaging sensor type: CMOS Picture total pixels: PAL: 628 x 586 NTSC: 510 x 496 Minimum illumination: 1.5Lux Lithium battery working time: 4 hours (approximately) Power supply: +5V DC Battery capacity: 500mAh AC-DC adapter: +5V (DC), 1,000mA