The Smart Acoustic SWM360HTBP Mic+BP V2 (520-542)

The SHM260 is an add on Wireless Microphone to suit the SWM260/360 Wireless System.
It features lightweight poly-carbonate construction for minimal handling noise. It's steel mesh grill is durable and can be replaced.
It runs on 2 x AA Batteries that are enclosed within its easy to open battery compartment. It's Infrared Pairing functionality for channel selection allows you to connect to your SWM260 quickly and efficiently.

Handheld Transmitter
Gain Adjustment Range: 0/3/6dB
Input Impedance: (Mic:5K½)/(Guitar: 760K½)
RF Power Output: 2mW/10mW/30mW
Spurious Rejection: > 50dB
Pilot Tone: 32.768KHz
Display: LCD
Power Requirements: 1.5V_2(AA)
Battery Life: > 8hours/ 1300mAH
Dimensions: 250*50mm
Weight: 360g