Sennheiser EW-DX SKM-S U1/5, Digital Handheld Transmitter, For EW-DX radio links, With on/off switch, Without microphone capsule, Frequency range U1/5: 823.2-831.8 MHz & 863.2-864.8 MHz, Transmitting power: 10 mW, Powered by 2x AA batteries or BA 70 rechargeable battery pack (not included), Dimensions without microphone capsule: 40 x 200 mm, Weight without microphone capsule: approx. 195 g