? 2 YEAR WARRANTY?The BOYA brand provides a two-year product warranty, if you have any questions, please contact us. ?TINY AND LIGHTWEIGHT MIC?BOYA BY-WM3T2 D1 is compact and lightest The transmitter weighs only 8.5g, which is equivalent to the weight of a walnut. the transmitter's dimensions are 52x17.5x16.1 mm, which is about the size of an AA battery. Wearing the transmitter won’t tug at your collar. you can easily complete the recording. ?50M OPRATION DISTANCE & NOISE CANCELLATION?Although BY-WM3T2-D1 is tiny, it delivers crystal-clear sound at distances of up to 50m(without obstacles).Omnidirection built-in mic for 360° sound pickup, With 2.4GHz, it hops channels automatically to ensure no audio dropouts. Double-click the power button to turn on the noise reduction function, which helps you remove ambient noise and reproduce top-clear sound. ?10H WORKING TIME?The transmitter's built-in rechargeable battery provides up to 10 hours of runtime and is charged through its Type-C port. The receiver is powered by your phone and operates without batteries. Plugging the receiver into your phone, the Type-C charging port on the receiver allows you to charge your phone while it is in use. It supports your uninterrupted work for a long time such as live streaming.getting rid of the "power anxiety". ?WIRELESS MICROPHONE FOR IPHONE?BY-WM3T2 D1 is a mini 2.4GHz wireless microphone system that provides high-quality sound for live streaming, vlogging, course recording, and other audio capturing applications.With an MFi Certified Lightning output, the BY-WM3T2-D1 is designed for Apple iOS devices, and it comes with 1 transmitter and 1 receiver.