Features:  UHF wireless lavalier microphone The signal in the UHF band is stable, with 30 selectable channels in the 520-580MHz frequency range, which can realize interference-free operation, and the working range can reach 50m (165ft).  Real-time audio monitoring  Enhanced headphone monitoring function, allowing you to monitor in real time while shooting.  Unidirectional lavalier microphone  Directional pickup, cardioid directivity suppresses unwanted noise. The included windshield can also reduce popping, wind and breathing sounds.  The pickup is more accurate and the sound is more delicate.  Easy-to-read LED screen  The transmitter with LED display can display battery status, channel and other information. Comes with a camera shoe, which can be directly fixed to your DSLR camera and other shooting equipment.  For camera or smartphone  The receiver with 3.5mm interface, with two 3.5mm cables, can be used with laptop/PC/DSLR camera/amplifier/DV/camcorder/smartphone/mixer, etc.  Universal battery  The receiver and transmitter both use 2 * 1.5V AA batteries, and the working time is 4-5 hours.  Wireless transmission  Signal stability in UHF band.     DV01 Package Included: 1 * Receiver;  1 * Transmitter;  1 * Lavalier Microphone;  1 * Camera cable;  1 * Mobile Phone cable;  1 * Accompanimet line;  DV02 Package Included: 1 * Receiver;  2 * Transmitter;  2 * Lavalier Microphone;  1 * Camera cable;  1 * Mobile Phone cable;  1 * Accompanimet line;