Features: Using compound anti-interference circuit, a transmitter can be configured to use multiple receivers at the same time to improve the quality and efficiency of user work. Using UHF frequency band, PLL frequency synthesis technology, strong anti-interference ability. Adopt WNCR noise reduction control technology, with low noise characteristics. Adopt LCD screen to display power, volume, working channel and other information. DPLL digital frequency control technology, preset 6 channels for optional use, with volume memory function. With noise reduction valve control system, automatic mute when no signal, equipped with high sensitivity microphone, sound clear and natural. The wireless working distance can be up to 100 meters (open space), which can meet a variety of site applications. Scope of application: Guide, simultaneous interpreter, commentator, hotel manager and so on. Specification: Material: ABS Color: Black Wireless Frequency Range: 638-648MHz Number of Channels: 6 Receiving Sensitivity: 12dB 3uV (When SNR is 12dB) Effective Distance: 90 m in open area Power Supply: 2*AA 1.5V alkaline battery (Not include) Audio Frequency Response: 40Hz-189kHz SNR: > 80dB Transmission Mode: Wireless Transmission Usage Time: about 15 hours Size: Approx. 85 * 65 * 20 mm/ 3.3 * 2.6 * 0.8 in Weight: 66.3 g Package list: 1 * Transmitter 1 * Microphone 1 * Chinese and English Instructions 1、Using compound anti-interference circuit, a transmitter can be configured to use multiple receivers at the same time to improve the quality and efficiency of user work. 2、Using UHF frequency band, PLL frequency synthesis technology, strong anti-interference ability. 3、Adopt WNCR noise reduction control technology, with low noise characteristics. 4、Adopt LCD screen to display power, volume, working channel and other information. 5、DPLL digital frequency control technology, preset 6 channels for optional use, with volume memory function.