What an impressive gadget this is! The Wireless Video Camera Pen contains the latest in miniaturized wireless video technology - squeezing a full color video camera, microphone, power source and a 2.4GHz transmitter inside a smart stylish pen! And the pen writes, too 
Just press the top of the pen and it begins transmitting high quality color video, with sound, to the supplied receiver which can be hooked up to a TV, video recorder or PC (with video card) up to 300 feet away.
Just imagine the possibilities for those undercover assignments!
Specification:
| Frequency | 4 Channels in 2.4 GHz |
| RF Output power | Within 10mW (CE-R&TTE approved) |
| Transmitting Range | 150m in Line of Sight |
| Built-in mic | 30 dB high sensitivity |
| Lens | f=3.7mm / view 50º |
| Operating Power | SR44W Battery x 5 |
| Operating Time | 40 minutes |
| Weight | 35g |
| Dimensions | 145 x 20 x 14.5mm |
Receiver
| Frequency | 4 Channels in 2.4 GHz |
| Video I/O | Phono plug |
| Audio I/O | Phono plug |
| Antenna | Built-in directional |
| Operating Power | DC 12V |
| Dimensions | 150 x 88 x 40mm |
Price:$239