BOYA BY-WM4 Is A 2.4 GHz Wireless System, Specially Designed For IPhone, Ipad And Most Of Android Devices, Tablet, But Also Can Work With DSLR Camera, Camcorder, PC Etc.It Consists Of A Bodypack Transmitter, A Camera-Mountable Wireless Receiver, An Omnidirectional Lavalier Microphone, A Camera Shoe Mount, 3.5mm(1/8") TRS Connector, 3.5mm(1/8") TRRS Connector, A Carrying Case, Foam Windscreen And Microphone Clip. The Receiver Is Built With Mic And Headphone Output Jacks. The Bodypack Transmitter Includes A MIC Jack And LINE IN Jack. The Operation Range Is 15m (49ft) Can Use Under Many Situations. Specification · RF Modulation: GFSK (Gauss Frequency Shift Keying) · Frequency Band: 2.4GHz (2405-2478MHz) · Frequency Response: 35Hz-14KHz±3dB · Signal/Noise: 76dB Or More · Distortion: 0.1% Or Less (32Ω,1 KHz,65mW Output) · RF Output Level:2 MW · Earphone Output Level: 32Ω,65mW · Audio Input Connector: 3.5mm Mini Jack · Reception Sensitivity: -85dB +/- 3dB / 0dB=1V/Pa, 1kHz · Operation Range: 15m (49ft.) · Power Requirements: 1.5V DC (One AA Size Battery) · Consumption Power: Transmitter: 1.5V/120 MA · Receiver: 1.5V/120 MA · Battery Life: Transmitter: Approx. 3.0 Hours · Receiver: Approx. 3 Hours Package Includes 1* BOYA BY-WM4 Transmitter And Receiver 1* Lavalier/Lapel Microphone 1* 3.5mm To TRS Audio Output Cable 1* 3.5mm To TRRS Audio Output Cable 1* Cold-Shoe Mount 1* Hard Case 1* User Guide