•High-Sensitive Clear Pick-Up Cartridge: Clear sound. High reduction, no distortion. With sound cotton, effectively reduces voice howling •Large Capacity Lithium Batteries: Built-in rechargeable lithium battery 4-5 hours on full power •LCD Display: Clear digital information, fast control of the information of frequency, signal, electric •Rotating: Lavalier Wireless Microphone, flexible use, can 360-degree revolve mic •Active Turn Plug: With a 3.5mm direct plug can adjust to the position of 45-degree, 90-degree, more flexible using Specifications: •Cartridge Style: condenser cartridge •Frequency Response: 20Hz~14Hz •Directionality: omnidirectional •Sensibility: -44±3dB •Output Impedance: 1000Ω±30% •Voltage Phase: Positive voltage at pin2 of the vibration film to produce a positive voltage relative to the pin3 •Output Connector: 3PXLP (M) •Receiver battery: 2600mAh •Microphone battery: 400mAh, 4Pcs total: 1600mAh •Weight: 1000g Package included: •4 x Microphone •1 x Receiver •1 x 18650 Lithium Battery •1 x English Manual •1 x 3.5mm Adapter •1 x Charging Cable •Other items not included