Features: Large-capacity battery: long battery usage, builts-in large-capacity battery for whole day. Fast matching, 3second connection and pairing: When transmitter and receiver is turned on, it take only about 3second to quickly complete the pairing connection, just to make your use more convenient. DSP intelligent noise reductions chip: newly upgraded noise reductions circuit, automatic noise reductions to show your voice, new intelligent frequency conversion noise reductions, noise filtering, clearer voice. Sensitive Omnidirectional pickup: Omnidirectional sound pickup with strong antiinterference ability can effectively identify original sound to meet the recording requirements in noise environment. With its lightweight design and square shape, the mic is easy to carry Specifications: Material:ABS Wireless version: 2.4G/ Bluetooth-compatible4.2 Receiving distance: 20meters Battery capacity: 350mAh Signal to noise: 90DB Frequency response ranges: 35Hz-20KHz Pointing type: omnidirectional Charging time: about 2hours Working hours: about 12hours. Charging interfaces: Type c charging interfaces input: DC5V 500mA Note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color. Package includes: Package A 1pc Microphone Receiver 1pc Microphone Transmitter Package B 2pcs Microphone Receiver 1pc Microphone Transmitter