Features: Dual microphone noise reduction: built-in noise reduction chip, which can effectively filter 90% of the noise, and the sound is clearer without noise. 360 pickup: high-sensitivity condenser microphone head, 360 no dead angle radio, good at capturing the details of the sound, rejecting the sound quality like boiled water. HIFI lossless sound quality: Specially invited professional tuning room to repeatedly tune to better sound quality, not radio, also better sound quality. Wireless technology: 1 second automatic connection, strong signal, unobstructed synchronous transmission, not easy to be interfered. 30m long-distance -free transmission: high-sensitivity mobile phone receiver, stable signal transmission, unrestricted free recording, and even more unimpeded outdoor recording. Real-time dual monitoring: You can connect headphones to monitor the radio effect in real time. Long-lasting battery life: Built-in high-capacity lithium battery, your recording time. Wide range of applications: suitable for outdoor , short video , interview recording, Internet eating and broadcasting, live selling, online class teaching, etc. Small size: mini 1cm thickness, lighter , weight only 26g, easier to wear. Specification: Name: Wireless Lavalier Microphone Pointing Type: Omnidirectional Frequency range: UHF transmission Frequency response range: 30Hz-18KHz Transmission distance: 30m Signal-to-noise : 90db Battery capacity: 500Ah /3.7V Rated input: DC5V/500mA Standard charging time: about 1 hour Working hours: 6 hours Working temperature: -10~45 Storage temperature: -20~60 Size: 44 x 44 x 23mm Material: plastic color: Black Package Contents: 1 x Microphone Transmitter 1 x Microphone Receiver 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.