- Body-Pack w/Lavaliere Microphone - Audio mute switch allows convenient audio muting while leaving the transmitter inchONinch - LED indicator: Unit inchONinch and inchLow Battery Alertinch - Locking 3.5mm mini-jack provides secure connection for removable microphone - Convenient economical operation with AAA alkaline or NiMH batteries (2x) - 2-1/4inch W x 3-3/8inch H x 1inch D; antenna 3-3/4inch; 2.8 oz. (Without batteries) - Lavaliere Mic: 4 ft. long cord; 0.6 oz.