high quality WIDE APPLICATIONSideal for clear sound recording, suitable for interviews, audio recording, video recording, etc.Offical Warranty2-YEAR OFFICIAL WARRANTYAuto-Repairing & ScanningUsed AUTO-REPAIRING function for match receiver and transmitter, make it easier to get startedBuilt-in rechargeable battery 4HThe built-in rechargeable battery of the transmitter provides up to 4 hours of run time, which helps you get a full day of audio recording.2.4GHzAdopts 2.4G wireless technology, with strong anti-interference ability and high performance; up to 30m(98ft) operation range(without obstacle).Wide CompatibilitySuits for DSLR Cameras (Canon/NIKON/SONY), Camcorders(PANASONIC), Smartphones(ANDROID&IPHONE)98ft/50m Long Transmission RangeWorking distance up to 98ft and designed for reliable and trouble-free performanceIntelligent Noise Cancellation Gives High-quality SoundEffectively identify the original sound and can record clear sound in a noisy environment. By clicking the power button twice, you can activate the noise cancellation feature.PLUG&PLAYLightweight and compact for easy carrying, Easy to use.SKM-W1UOmnidirectional lavalier microphone, Digital 2.4 GHz Frequency Band, Super-clear recording sound, Compatible with smartphones, Tablets, PCs etc.