Requires a DC power source. You can install a 9V battery by removing the 2 screws on each side or plug a 9-13.8 DC volt power souce into the jack on the left side of the tester. Battery and DC power souce not included.

Test microphones and speakers for

• Cobra
• Uniden
• Midland
• Realistic
• Also tests Gray Button mics

Red LED Transmit light, Green LED Receive light, Volume switch, External speaker jacks

Instructions included

One year manufacturer warranty