High-definition digital tube display frequency, makes operation more easy and convenient. The built-in battery not only can be used repeatedly charging, and light weight use safety. A single charge can always use more than 10 hours, long battery life. There is no limit on the amplification products, mainly to accept FM radio signals and electronic equipment with audio playback function can be used instantly into a megaphone. Small and exquisite, portable, amplification function anytime and anywhere. Widely used: teaching, tour guide, sales promotion, lectures, meetings, karaoke, fans singing and so on. FM Wireless Microphone Headset only, other accessories demo in the picture is not included! Specifications: Item Type: FM Wireless Microphone Headset Size: 14x4x17cm/5.5x1.5x6.6in Color: Black Resistance: 680Ohm Sensitivity: -52dB1.5dB Wireless Distance: 15-20m/49-65in Transmission Frequency: 87Mhz-108Mhz Quantity: 1 Pc