Features: 2.4G wireless technology, automatic frequency pairing and instant use. The true wireless second connection can reach a distance of 30m, and the stable transmission of audio and video is synchronized. Strong compatibility, compatible with 99 percent of devices. Compatible with cameras, mobile phones, camcorders, computers, sound cards, recorders, mixing consoles 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, advanced condenser microphone super clear radio. Receives sound from all directions in equal amounts, the voice is cleared and restored to clearly record the sound details. Intelligent noise reduction, filters noise and voice more clearly. Built-in DSP chip, intelligent noise filtering can effectively reduce the effect of noise on the recording. Specification: Name: Wireless Lavalier Microphone bluetooth: 5.0 Audio delay: 30 ms Sampling rate: 48 kHz Digital audio: Type-C transmission Transmission distance: 30 m Frequency response: 20 Hz-20 kHz Analog audio: 3.5 mm terminal transmission Battery life: 8H-300mAh or H Working temperature: -10-50 Number: B-1PCS Transmitter Two-way monitoring, real-time adjustment during recording. Both the transmitter and receiver have a 3.5 mm interface, real-time audio feedback and adjustment during recording. Built-in -capacity lithium battery, 8H long battery life, can record and transmit for a whole day, and the power is durable to protect your recording market. Mini portable, more design, no burden to carry. Material: plastic Color: black Package contents: 1 x Transmitter 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 screens may cause the color of the item in the picture to differ slightly from the real thing. The allowed measurement error is 1-3 cm.