Wireless Guitar Transceiver System Built-in Rechargeable Built-in Wireless Guitar Rechargeable BatteryFeature:* 1. 730mhz UHF native transmission, anti-interference, ultra-short latency.*2. Built-in rechargeable lithium battery, long working time, equipped with USB cable, easy to charge.*3. The simultaneous use of 4 sets of devices is supported, and the maximum transmission range can reach 50m.*4. Simple to use, small size, lightweight, easy to carry. Specification:Material: ABSolor: Black (as shown)Size: 11*4.5*4.5cmFrequency: 730mhz high frequencyAudio response range: 20Hz-20kHzTransmission range: max. 50m (without barriers); 30m (Through Wall) Transmission Delay: Less than 4ms Power Supply: Built-in 3.7V 600mah Rechargeable Lithium Battery Charging Time: 2 hours Continuous Use Time: 6 hours Charging Port: Micro USB Application: Can be used for electro-acoustic instruments such as guitar, bass, violin, etc. Package Contents:Wireless Guitar Transmitter * 1Guitar Wireless Receiver * 1USB Cable * 1Manual * 1Note:1. All photos are professionally color-coded, but due to different ambient lighting and display device settings, there may be some deviation between the image you see and the subject itself. Please understand that.2. The data is measured manually, there may be some deviations, but this does not affect usage.