Model: KS-638R - Receiver ONLY surveillance camera sold separately - 2.4GHz wireless transmission - 4 channels to select from: 2.414/2.432/2.450/2.468GHz - Supports SD/MMC memory cards (up to 16GB) USB storage devices FAT32 hard disk drives HDD (40GB max) - Doubles as a portable media MP3/MP4 PMP player - Playback formats: MP3/MP4/MPEG-1/MPEG-4/AVI/ASF/MOV/WAV/JPG/JPEG/TIF/TIFF - Supports both video-in and video-out/TV-out - 960*240 2.5" LCD screen (Manufacturer rated actually maybe 320x240) - Built-in 1800mAh lithium rechargeable battery (approx 5-hour playback per charge) - NTSC/PAL output - Comes with earphones AV cable USB cable 100V~240V AC adapter