Features: Wireless transmitter and receiver set, suitable for electro-acoustic instruments such as guitars and bass. Uhf 730mhz original sound transmission, anti-interface and ultra-short delay, give you the music sound. Support 4 devices to work at the same time, one to one; the maximum transmission distance can reach 50 meters. Built-in rechargeable lithium battery, long working time; and equipped with USB data cable, convenient for charging. Plug and play, easy to use; compact and light, easy to carry. Specification: Colour: Black Material: ABS Audio response range: 20hz-20khz Frequency: UHF 730mhz Transmission range: max.50m (no obstacles); 30m (through walls) Transmission delay: less than 4ms Power supply: built-in rechargeable lithium battery 3.7v 600mah charging Mouth: micro-usb Item size: 11*4.5*1.5cm / 4.3*1.8*0.6 inches Weight Item Size: 35g / 1.2oz (each piece) packing list: 1 * Transmitter 1 * Receiver 1 * User Manual 1 * USB charging cable Notice: The above is only the package content and does not include other products. The guitar amplifier and guitar shown in the picture are not included. Light photography and different monitors may cause the color of the object in the image to be slightly different from the actual object. The allowable measurement error is +/- 1-3cm. 2 pieces of guitar UHF wireless system wireless transmitter receiver guitar transmitter built-in rechargeable battery SZRH A-B