Features: Enjoy the freedom of wireless speaking anywhere with the wireless microphone. With FM microphone transmitter and receiver. Just connect the receiver to amplifier and you can communicate wirelessly up to 10m. Perfect wireless microphone for teaching, meetings, presentations, running a show or any where you need a microphone. Specifications: Modulation: FM Frequency response: 100 - 10000Hz Power: 9V battery (not included) Operating distance: Up to 10m / 32.8ft Receiver size: 30 * 11 * 3.5cm / 11.8 * 4.3 * 1.4in Receiver weight: 341g / 12oz Package size: 36.5 * 28 * 6cm / 14 * 11 * 2.4in Package weight: 805g / 1.77Lb Package List: 2 * Microphone 1 * Receiver 1 * Cable 1 * User Manual(English)