Back to main This is a very low priority area. Pix Doc Mod Model Type Year RF property Aitron "Wristo" AIE1541 Wrist radio 1975 LW or MW receiver Aitron "Wristo" LED Wrist radio / LED watch 197x MW receiver Casio TM100 Wristwatch 1987 88-108 MHz transmitter Cybiko Classic Hand computer / PDA 2000 Wireless networking Cybiko Xtreme Hand computer / PDA 2001 Wireless networking