No Bluetooth Or Apps Required.Can Be Freely Switched Between Normal And Noise-Cancelling Modes, Thus Guaranteeing The Sound Quality By The .Compatible With Ios Smartphones, Ipads, Android Type-C, Usb-C Smartphones, Cameras, Pcs,Laptops, Computers Etc. The Microphone Is Suitable For Interviews, Online Meetings, Podcasts, Microblogging And Live Streaming.The Lavalier Microphone Has No Wires And Is To Cover Signals Up To 70 Feet.The Microphone Has A Built-In Rechargeable Battery With Up To 8 Hours Of Run Time And Up To 24 Hours With The Use Of A Charging Case,(1 Receiver 2 Transmitters And 1 Charging Case) This Mini Wireless Lavalier Microphone Kit Has 1 Receiver And 2 Transmitters, Which Makes It Possible To Record Sound Or Video From Both Sides At The Same Time. In Addition, You Can Use Just One Microphone For Interviews, Video Blogs, Live Broadcasts, Podcasts Or Online MeetingsBattery Capacity:60mahCharging Case Capacity:600 MahWorking Time:About 5hCharging Time:About 50minSignal-To-Noise Ratio:64 DbmTransmission Delay:9-18msFrequency Response Range:20-20khzFunction:Good Noise Reduction Effect, With Monitoring, With Reverb, With External Playback,Type:B: interface one for twoColour:As ShownMaterial:plasticSize:6x3x2cmPackage Contents:1 * Chinese And English Manual2 * Charging Cable2 * Microphone1 * ReceiverOnly 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.