The Shure UR1M-H4 Micro Bodypack Transmitter (H4 / 518-578 MHz) features a miniature design and weighs just 2.2 oz (62g) without batteries. The transmitter is designed for use with the receivers in the Shure UHF-R series including the UR4S and UR4D. The UR-1M bodypack does not include a microphone, however the TA4-male connection is compatible with Shure lavaliers, head-worn microphones and instrument cables featuring a TA4-female connection. The transmitter is capable of 10 or 50mA output power, enabling extended range whenever necessary. The UR1M features a backlit LCD display and is powered up to 9 hours on two 1.5V AAA alkaline batteries (low RF power).