SM-7100 beltpack transmitter Features Multi-function LCD display for channel/frequency, sensitivity, battery status indicator, Alkaline/NiMH battery selection. 100 frequencies agile in 20 MHz bandwidth. ±40 KHz peak deviation. 35 mW maximum transmission power. Supports various lavalier, headset and instrument microphones as well as guitar cable. Power-On LED. Uses 2 pcs AA batteries to operate. Low current consumption. Long operating time up to 16 hours. Audio mute switch. Standard 4-pin mini XLR connector. 1/4 wave whip antenna. Detachable belt-clip for changing of wearing position. FCC and CE approved. Matching battery charger: HC-30, HC-37 Specifications Model SM-7100 Frequency Range UHF High Band 600 - 900 MHz Switching Bandwidth 25 MHz Switchable Frequency 100 RF Power Output < 35mW** Spurious Emission > 60 dB below carrier Dynamic Range > 110 dB Display Screen LCD Peak Deviation ± 40KHz Antenna 1/4 wave, whip antenna T.H.D < 0.5% Battery Type AA x 2 Operating Life about 16 hours (Alkaline) Charging Function YES Battery charger HC-30, HC-37 Connector 4-pin mini XLR type Dimension (mm) 100(L) x 66(W) x 24(H) Weight (g) 97 Approval CE,FCC ** Remark: The above specifications are subject to change without prior notice. The output power may vary from country to country.