1. High quality sound--- The condenser microphone core, so that the sound reproduction of the instrument can reach 99%. 2. Stable signal transmission --- The signal transmission distance is 164ft (50m). A total of 16 UHF channels can be , and 3-4 sets of microphone systems can be used at the same time without signal interference. 3. Easy to use ---The transmitter has a spring clip with silicone, which will not cause damage to the paint. Clamp the transmitter on the side of the violin, plug the receiver into the MIC interface of the speaker, and then turn it on and use it . 4. High-capacity lithium battery --- One divides into two charging cable to charge the receiver and transmitter at the same time, greatly reducing the charging time.The transmitter and receiver has built-in 750mAh battery, which can be recharged 2000 times, and can be used for 6 hours after 2 hours of charging. 5. Widely Used --- This violin wireless microphone can be used in solo performance, accompaniment performance, personal entertainment, group performance. 1/4 inch plug (and give a 1/4 inch(6.35mm) to 1/8 inch(3.5mm) conversion plug) can be used to a of equipment, loudspeakers, computer audio, drawbar speakers, mixers, and so on. RECEIVER Frequency range: 660-690MHz (region dependant) Frequency: Pre-set 16 selectable channels Modulation mode: pi/4 DQPSK Latency: Less than 6ms Sampling: 48KHz Frequency response: 60Hz - 15KHz 2dB Total Harmonic Distortion: Less than 0.8%(1KHz) Signal/noise ratio: 92dB Receiving sensitivity: -92dBm Output: 6.35mm plug Power supply: 3.7V Lithium battery Power consumption: 6 hours continuosly using Dimensions: 185x20x10mm TRANSMITTER Frequency range:660-690MHz (region dependant) Modulation mode: pi/4 DQPSK Transmitter power: 10mW Sensitivity: -47 db2dB Frequency change: IR synch Microphone type: Condenser Microphone dimension: 14x5.0mm Power supply: 3.7V lithium battery Power consumption: 6 hours continuosly using Dimension: 125x40x20mm Plug Type: UK plug,it applies to Malaysia, the United Kingdom and so on. Colour:black Material:composite material Voltage: AC100-240V Package Contents: 1x Receiver 1x Transmitter 1x USB Charging Plug 1x Charging Cable 1x 6.35mm to 3.5mm Conversion plug 1x Carry Bag 1x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.