1.This microphone is a wireless microphone equipped with a receiver and transmitter. Simply insert the receiver into the device and turn on the microphone to automatically connect, without the need for Bluetooth or other unnecessary operations. 2.Suitable for Android phones, computers, tablets,etc.Microphone is suitable for broadcast video, recording, conference, YouTube, Facebook Live, Vlog, Tik tok, Twitc, etc. 3.For Samsung Phones:The original camera of Samsung brand phones maybe does not support external microphones and can be directly used in third-party software such as YouTube, Facebook, and Toktok,or download third-party camera software to use. 4.For Android phones, Especially OPPO and VIVO phones,you need to search for OTG in the settings and turn on the OTG power supply to use them normally. Function: Noise Cancellation Mode: Default noise reduction function upon startup, no need for manual adjustment. Silent mode: Manually turned on and off. Reverb mode: Manually turned on and off. Product parameters: Transmission distance: 20-50 meters (without obstacles) Battery usage time: 3-6 hours Built in battery capacity: 50mAh-100mAh Wireless transmission: 2.4G Signal to noise ratio: ≥ 75dB Sensitivity: -38dB Transmission delay time: ≤ 25ms Transmission frequency band: 2400MHz-2483.5MHz Color: Black Material: ABS Package Contents: 1 set of Wireless Lavalier Microphone 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.