WEISRE WIRELESS MICROPHONE SYSTEM VHF Black { DM-3308A } Main Features: – Double channels design, can use two handheld wireless microphones without interference at the same time. – High precision quartz crystal to lock the frequency. – High sensitivity and high S/N ratio, high fidelity without noise. – Superior selectivity, multi-channel can use at the same time, do not interfere with each other. – Suitable for studio / karaoke / radio / etc. – Operation distance is up to 20 meters. System Parameters: – Carrier frequency range: 220 – 270MHz – Frequency response range: 60Hz – 16KHz – Harmonic interference: more than 90dB – Radio frequency stability: plus or minus 0.005 percent – S/N ratio: more than 90dB – Output intensity: 0 – 400mv – Harmonic distortion: less than 0.5 percent – Microphone is powered by 2 x AAA battery ( not included ) – Microphone dimension: 260mm x 30mm x 30mm – Receiver dimension: 110mm x 45mm x 15mm Specification: Brand WEISRE Specifications Channels: 2 (2.0) Special Feature: Portable,Wireless Dimensions and    Weight Product weight: 0.1600 kg Package weight: 0.2870 kg Package Size(L x W x H): 29.00 x 9.00 x 7.50 cm / 11.42 x 3.54 x 2.95 inches Package Contents Package Contents: 1 x Microphone, 1 x Receiver, 1 x English User Manual