What you will get: Wireless Microphone*1; Microphone Receiver;*1; 6.35mm to 3.5mm Adapter*1. Anti-slip ring*1, USB charging cable*1, manual*1. If you use multiple microphones at the same time or there is noise, please switch channels (click the "Ch+Ch-" button) to ensure that the channel numbers of each microphone are different and the channel numbers are far apart. 15 channels can be adjusted to eliminate noise and radio interference, and up to 15 sets of microphone systems can be used at the same time. Dynamic vocal microphone: built-in dynamic reverb microphone (signal-to-noise ratio: 90db/frequency range: 50hz-18khz, sensitivity: -36db±2db, frequency range: 500-595mhz), built-in boost circuit design, making the sound clearer. The vocal microphone has a built-in high-sensitivity professional dynamic coil to ensure maximum gain before feedback, allowing your voice to penetrate any mix. It features low processing noise sensitivity, high gain-before-feedback and excellent sound quality. Long-distance wireless karaoke microphone: the wireless distance is upgraded to 98 feet (30m), the microphone manufacturing process is upgraded, the signal is stable, no delay, no radiation, anti-howling, anti-interference, constant frequency, no distortion <0.2%, 30 Uhf Channels can be tuned. ?The shell of the microphone is made of alloy material, which is harder, lighter and more wear-resistant. Handheld wireless microphone and system: The microphone receiver has built-in Bluetooth function, which can be connected to mobile phones, notebooks and other Bluetooth devices as music players. (Bluetooth name: X7) The wireless microphone has echo, treble, bass control buttons and volume control, you can adjust different sound effects in time according to your preferences. Easy to use: Plug and play, no pairing required. No need to buy batteries! The receiving box adopts 6.35mm (1/4") Aux or 3.5mm (1/8") MIC interface audio head, which can be directly plugged into any audio system (especially suitable for karaoke, lectures, conferences, performances, indoor or outdoor) ). It is specially designed for outdoor karaoke speakers, PA speaker systems, power amplifiers, etc., no need to connect the output line separately. Microphone Battery Operated & Rechargeable Receiver: The microphone does not come with any batteries, we recommend 2 AA alkaline batteries. ? Install the battery correctly in the + - direction. ?Before first use, the receiver should be charged for 3 hours. ?Long press the button of the microphone and receiver to turn on, the rechargeable Bluetooth receiver has a built-in 1200mAh battery, and it can work continuously for 6 hours within 3 hours after being fully charged.