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:5K?)/(Guitar: 760K?) 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