2.4Ghz Wireless Spy camera Pen with  DVR *Wireless transmission provides real time video on DVR to view effect as you record;*Near and far focus available for choice (near focus for small text record);*3.5"TFT LCD screen with up to 800X600 resolution*Video Format: Mpeg-4,AVI (800 or 320 @ 30fps) MP4,3GP*Memory: built-in flash :2GB~8GB; support SD card 1GB to 16GB*420TV line for clear image;*Night vision available*4 channels available to avoid possible interference;*Built-in antenna and rechargeable Li-battery;*Min. 100m transmission distance without blocks Transmission Frequency Type I:  ISM 2,400MHz~ 2,483MHz    4CH*Type II:  2370Mhz (CH1); 2510MHz (CH4) (avoid interference)  Modulation Mode  FM  Antenna Type  Hidden  Unobstructed Effective Range   100m(Without Block)  Operating Temperature  0℃~ +50℃ / +14℉~ +122℉  Storage Temperature  -20℃ ~ +60℃ / -4℉ ~ +140℉  Operating Humidity  85%RH  CAMERA Transmission Frequency ISM 2,400MHz~ 2,483MHz CH1 CH3 Audio subcarrier frequency 6.0Mhz Antenna Built-in 2.4G antenna Transmitting Range 300 feet in line of sight CMOS Total Pixels 656×492(NTSC) Horizontal resolution 420TV line Frame rate 30FPS Built-in mic. 55dB high sensitivity View Angle 62° Camera lens focus Beyond：3m vicinity:10cm Minimum Illumination  0.1 Lux / F1.5 Transmission Power  10mW Battery Performance  Li-ion Battery 280 MAH Working Time  2.5 hours Charge time 1 hour Operating voltage DC 5V Operating current 105MA Color  Golden/Silver Dimensions( LX D) 160X15mm Weight  40g  RECEIVER Receiving CH CH1~CH4 Sensitivity -92dB LCD  3.5 inches TFT AV out NTSC / PAL Resolution 640*480 / 320*240 Video compress MPEG-AVI    30fps Play format RM / RMVB / 3GP / MP4 / FLV / AVI / ASF / WMV / DAT / VOB / MPG Frequency 20HZ-20KHz  stereo Earphone Output Left: 20MW+ right 20mW [16O](suit to largest volume) Play format MP3 / WMA / AMR / AAC / FLAC / APE