1-to-4 UHF Portable Wireless Transmitter Receiver Clip Lapel Headset Microphone 

       This product adds several new domestic unique technologies based on the original microphone technology, which makes the system have ultra-high sensitivity, strong anti-interference ability and excellent stability. The original technology includes high-efficiency low-cost RF emission technology and SMT production process in the United States, and uses a locking frequency of better than 10ppm quartz crystal, dynamic audio compression, expansion circuit, image frequency suppression circuit, switch-time shock elimination circuit, anti-return circuit Variable output control technology, computer EDA, analog online assisted design, etc.   

     Features:   

     1. The frequency is fixed, it can be used at boot, convenient.   

     2. Four-channel volume is independently adjustable, providing 1+4 audio output, and four-channel audio output is independently controllable.   

     3. Handheld/collar clips in the transmitter can be used in a mix and match.   

     4. 5 sets of different frequency points can be used simultaneously.   

     5. Very suitable for stage performance.   

     6. Lightweight, mini size. Easy to carry.    

     Specification:   

     Model: U-F4000   

     Weight: about 896g/31.61oz (transmitter), about 270g/9.52oz (receiver*4)Channels    

     Size: about 48*19*4cm/18.9*7.48*1.57in (transmitter), about 11*6.3*2cm/4.33*2.48*0.79in (receiver)   

     Battery: AAA*2 (Not Included)   

     Transmit power: <30mW (depending on applicable national regulations)   

     Harmonic power: <35dB (main wave)   

     Battery life: >10 hours   

     Oscillation mode: quartz crystal oscillation   

     Stability: 10PPM   

     Wireless interface: BNC/50Ω   

     Maximum frequency offset: 50KHz   

     Signal to noise ratio: >103dB   

     Distortion: <0.5%@1KHz   

     Image interference: >85dB   

     Adjacent frequency interference: >75dB   

     Frequency response range: 50Hz~16KHz   

     Squelch control mode: multiple squelch circuit   

     Maximum output level: +10dBV   

     Sensitivity adjustment range: 12-32 dBμV   

     Power supply: external DC power supply, 0.8A, 12~15V DC   

     Use distance: Open environment: 50-80m Complex environment: 30-40m   

     Frequency range: 621.5~643.7Mhz   

     Package List:   

     1 * Transmitter   

     4 * Receiver    

     1 * Instruction Manual   

     4 * Microphone    

     1 * Charger   

     1 * Audio Cable   

     2 * Antenna