This is a multifunctional headphone. You can use it to listen to your favourite radio program, music, etc with cable or without cable. You can also use it as a monitor to monitoring the safety of kids and . It's very practical and for professional use or personal use in daily life. Whether you are a headphone or not, it's a perfect choice for you. Features - Color: Black - Material: Plastic - Size: 20.00X16.00X7.50cm/7.86X6.29X2.95in - Receiving Frequency: 86-108MHz - Loudspeaker Diameter: 40mm - Modulation: FM/ - Impedance: 32Ω - Launch Distance: 30M(360-degree barrier free) - Sensitivity: 110db S.P.L at 1KHz - Working Voltage: 3V - Rated Power: 15mW - Working Current: 12mA - Dynamic Working Current: 5mA - Power Capacity: 150mW - S/N Signal-to-noise Ratio: More than 45db - Frequency Response: 20~20 KHz - When used alone, the receiver can be used as a . - You can use it to listen to your favourite radio program, music, etc with cable or without cable. - It also can be used as a monitor to monitoring the safety of kids and . - It's very practical and for professional use or personal use in daily life. - Whether you are a headphone or not, it's a perfect choice for you. Note: The pillar is not included. Package list: 1 x headphone 1 x cable