The BOYA BY-WM4 is a compact wireless microphone designed for reliable and trouble-free performance.It can work with Smartphone,Tablet,DSLR camera,Camcorder, Audio recorder,PC and others audio/video devices. Features Clear recording sound Compatiable with smartphones,DSLR cameras,Consumer Camcorders,PCs etc. Light and compact for easy carrying Omnidirectional lavalier microphone Hard case included Standard camera shoe mount and clip included Power requirements:1.5V DC, ie. AA size battery (not included) Audio input connector:3.5mm mini jack Operation range:15m (49ft.) One extra foam protector included for free.