Specifications:Color: Black or whiteProduct weight: 69gProduct material: ABSTransmission distance: 20m/65ftSound delay: ≤25msHeadphone monitoring: SupportTransmitter battery capacity: 80mAhRechargeable case battery capacity: 800mAhAdapter: 5V/1AFeatures:Additional Microphone for Wider Use: Support dual-microphone simultaneous recording. Suitable for Living streaming, V-log, Interviews, Short Videos, Mukbang, etc.Adopt an omnidirectional condenser microphone, 360° surround sound pickup, and better spatial senseBuilt-in intelligent denoise module can effectively filter out the noise, high fidelity sound quality65ft Wireless ReceivingNo APP is needed. Plug in the receiver on the phone to connect automaticallyLong-lasting Charging Case: Using wireless earbud type box design, easy to store, lightweight and portableTips:There may be some cell phones such as can not use, please try to open OTG, such as OPPO and VIVO. The general way to open OTG: search OTG in the phone settings to open.Incompatible phone models: Samsung S8, S9, S20, Google..