The K4AVU Ten minute ID timer ID's at the 10 minute mark, and automatically resets for the next 10 minutes to occur. It is a stand alone unit, and is powered by three AAA batteries. Batteries are installed. The unit can be wired to some models of transceiver's. It has a HI-Z audio output and a Key out. At the time of purchase your call sign will be programmed into the processor. It will ID with your call on cw every ten minutes. It has a built in piezo speaker. Price is $49.00 shipped to the 50 USA States. Payment: PayPal, money order, check. Email: k4avu@yahoo.com. Thanks for reading this ad. Paul K4AVU