Feature: 2.4GHz 4-channel recordable wireless monitor; AVI format MPEG-4 wireless Video recorder, with real-time display; MP3, MP4 player, picture browse supportable; High performance mini camera (1/3" CMOS, 380 TVL); 30--100m unblocked transmitting distance; Cabled Video recording and TV recording function supportable; 882*228 high-definition 2.5inch TFT LCD display screen; Inbuilt with 64MB memory block, MMC, SDcard, Udisc, mobileHDmemory, reading and writing supportable; OTG and 2.0 high-speed USB interface supportable; Support the connection with the monitor/TV so as to play and record programs; Inbuilt with high-capacity lithium battery, 5h continuous playtime. Parameter: Transmitting Frequency: CH1 2.414GHz; CH2 2.432GHz CH3 2.450GHz; CH4 2.468GHz Db Level: -98dB LCD 2.5TFT: 882*228 Trans. ective LCD Image Device: 1/3" CMOS Lens: 6mm/ 45? Video Mode: PAL/ NTSC Resolution: 640*480 / 320*240 Video Compression Format: MPEG-AVI Max 30fps Play File Format: MPEG-1/ MPEG-4/ AVI/ ASF/ ADPCM Audio Frequency Range: 20Hz-20KHz Audio Output Channel: Stereo Audio Play File Format: MP3/ MP2.5 Speaker: 1w Picture Format: JPG/ JPEG Flash Memory: 64MB Storage Media: SD/ MMC/ SX/ U disk/ HDD OS: Windows 98SE/ ME/ 2000/ XP Serial Bus: USB2.0; USB OTG1.1 Disk File Format: FAT32 Language: Chinese/ English Power Supply: C200 DC5V/800Ma; R822 DC5V/2A Internal Battery: Li-ion battery 2500Mah