Pen Camera - Pen with a built-in 2.4GHz transmitter, color camera and power source,the pen is one of the smallest systems we carry! This unit holds a 5.6 mm, 380 TVL color camera and a complete, 4-channel video transmitter for transmissions up to 700ft line of sight. Five internal 1.5 volt alkaline batteries provide power for the unit. the pen itself is still fully functional. One-year warranty $299.00