Wireless transmitter and receiver can be used for electroacoustic instruments such as guitar, bass, violin and so on. Features: Wireless transmitter and receiver set for electroacoustic musical instruments like guitar, bass, etc. UHF 730MHz true quality sound transmission, anti-interface and ultra-short delay, giving you the perfect music sound. Supports 4 sets of devices working at same time, transmission range is up to 50 meters. Built-in rechargeable lithium battery, long working hours, and comes with USB cable for convenient charging. Plug and play, simple to use. Compact size and lightweight, easy to carry. Specifications: Color: black, white (optional) Audio response range: 20Hz-20kHz Frequency: UHF 730MHz Transmission range: max.50M (no obstacle), 30M (through-wall) Transmission delay: less than 4ms Battery: 2 * 3.7V 600mAh rechargeable lithium battery Charge port: micro USB Item size: 110 * 45 * 15mm / 4.3 * 1.8 * 0.6in Item weight: 35g / 1.2ounce Package size: 150 * 85 * 50mm / 5.9 * 3.3 * 2.0in Package weight: 110g Package list: 1 * Transmitter 1 * Receiver 1 * Charge Cable