Features: 2.4G wireless technology, automatic frequency pairing and instant use. The real wireless second connection can reach a distance of 30m, and the stable transmission of audio and video is synchronized. Strong compatibility, compatible with 99% of devices. Compatible with cameras, mobile phones, camcorders, computers, sound cards, recorders, mixers and other equipment. Barrier-free transmission, 30m effective transmission without delay. High-performance wireless technology, super stable signal, audio and video synchronization. Omni-directional 360 radio, high-end condenser microphone super clear radio. Receiving tongues from all directions in equal amounts, the human voice is cleaned and restored to clearly record the sound details. Intelligent noise reduction, filtering noise and human voice more clearly. Built-in DSP chip, intelligent noise filtering can effectively reduce the impact of noise on recording. Specification: Name: Wireless Lavalier Microphone bluetooth: 5.0 Sound delay: 30ms Sampling rate: 48KHz Digital audio: Type-C transmission Transmission distance: 30m Frequency response: 20Hz-20KHz Analog audio: 3.5 terminal line transmission Battery life: 8H-300mAh/H Working temperature: -10~50 quantity: A-2PCS Transmitters Two-way monitoring, real-time adjustment while recording. Both the transmitter and receiver have a 3.5mm interface, real-time ear feedback, and adjust while recording. Built-in -capacity lithium battery, 8H long battery life, can record and broadcast for a whole day, and the power is durable to protect your recording market. Mini portable, more design, no burden to wear. Material: plastic colour: black Package Contents: 2 x Transmitters 1 x Receiver 1 x Type-C Charging Cable 1 x English User Manual 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.