UNIPEX Wireless Microphone WM-3130

●Unidirectional electret condenser type. ●Supports 13 channels by combining tuner and microphone channels. ●Headset type. Since you can use both hands freely, it is ideal as a microphone for athletic meets, events, and demonstrations. Transmission frequency: 300MHz band Transmission output: 1mW Microphone used: Unidirectional electret condenser microphone Frequency response: 100Hz to 7kHz (1kHz standard, 50μs emphasis) Battery used: 1 AA battery Battery life: Approximately 16 hours [when using manganese dry battery R6PU (black)] (at room temperature continuous use) Approximately 32 hours [when using alkaline dry battery LR6] (at room temperature continuous use) Dimensions: Main unit/width 66mm x length 106mm x thickness 22mm Headset type microphone maximum width/130mm, cable length/approximately 1000mm