UHF 600-690Hz frequency range (region dependant). Digital wireless audio transmission. 48KHz audio sampling mode. Pre-set 16 selectable frequencies. Digital ID code, completely solves frequency interference. IR sync downloading the frequency from receiver. Lithium battery power supply. Portable plug-on receiver, plug in the mixer or active speaker directly. Up to 40m line-of-sight operating range. Suitable for saxophone stage performances, street performances, etc. Frequency: Pre-set 16 selectable channels. Modulation mode: pi/4 DQPSK. Frequency response: 60Hz – 15KHz ± 2dB. Output: 6.35mm plug. Power supply: 3.7V Lithium battery. Power consumption: >5 hours continuosly using. Frequency change: IR synch. Microphone dimension: F145.0mm. Power supply: 3.7V lithium battery. Power consumption:>5 hours continuosly using. Note: the other accessories are not included. Thanks for your understanding. Due to we sell these small item. All our products will be checked and packaged in good condition before we sent. Please check the parcel before the courier leaves. We will give you a satisfied solution. We will do best to help and provide the best solution to make customers satisfied. Damaged by : Undue. Wear, dirt, misused, improper installation, accident. Disassembled or Repaired by unauthorized person. Any damages caused by improper packaging when return the item back to us. Thank you for your understanding and attention. We will also do better and more professional customer service than other sellers. Many thanks in advance. Listing and template services provided by inkFrog.