Features Specifications:2.4GHz Wireless hidden Camera Pen with A/V Receiver---WSC-805  A pen of normal size & weight can record anything you see and hear into the wireless A/V receiver, which can connect to TV set, MP4,DVR,etc. No need any cables to connect with them.Just hold it at hand,or hang it into the pocket randomly, or place it anywhere you like, it begins to transmit color video with perfect sound to 300 feet away! And the pen writes too:-) Just slide the pen clip to expose the camera pinhole, and twist pen bottom into writing state, it begins to work!  Moreover, it comes with solar charger, which can offer power supply to the pen at anywhere and support super long working time up to 9 hours!  Its ideal for the security personnel, law enforcement agencies and journalists to fulfill the undercover assignments, like evidence collection, hidden investigation and surveillance, etc. It is also great as a toy for hobby enthusiasts, as body worn solutions Features: Wireless transmission to assure the great safety for surveillance work;  Normal size & weight of camera pen; camera lens safely hidden under the pen clip;  Wireless camera pen continuous operation time up to 1 hour;  Portable solar charger offers power supply for camera pen up to 9 hours ,very convenient for travel;  Up to 100m(300ft.) transmission range in open space;  A/V receciver has standard AV output for TV set, MP4, DVR, etc.;  A/V receiver is in mini size & beautiful design.  Specification:  WP-620 camera pen:  Frequency2414Mhz(CH1)Audio subcarrier frequency.6.0MhzAntennaBuilt-in 2.4G antennaRF Output power10mWTransmitting Range300 feet in line of sightSensor1/4 CMOS colorResolutionNTSC:510X490; PAL:380X296Horizontal resolutionNTSC:380 TV line; PAL:240 TV lineMinimum illumination2.0luxBuilt-in mic.55dB high sensitivityView angle60 degreeLi-battery capacity110MAHOperating time1 hourCharge time15 minutesOperating voltageDC 5VOperating current95MASolar charger high capacity built-in Li-battery1350MAH: it can discharge 9 times for transmitting operation up to 9 hoursSolar energy board5.5V/80MAColorred/blue/blackweight70gDimensions( LX D)14.80X1.40 cm WR-702 A/V Reciever: Receiving FrequencyISM 2,400MHz~2,483MHzIntermediate Frequency480MHzDemodulation TypeFMAntenna50 ohm SMAReceiving Sensitivity≤-85dBmIntermediate Frequency480MHzVideo Output Signal Level38dBAudio Output Signal Level1.0Vp-p@600 ohmConsumption Current180mAPower SupplyDC +8VDimensions(W×D×H)68*78*16 mmWeight120 gOperating Temperature-10+50/+14+122Storage Temperature-30+85/+-22+185Operating Humidity85%RH