Specifications: Material: ABS + Metal Color: Black Size (L*W*Thickness): 110*43*17mm / 4.3*1.7*0.7in Weight: 50g Frequency Band: UHF Frequency Range: 20Hz-20kHz Transmission delay: < 4ms Transmission Type: Wireless Charging time: 2H Use time: 4H Charging Port: Micro USB Features: WIRELESS SYSTEM FOR ELECTRIC GUITAR: Great wireless system for electric guitars, bass guitars, electric violin and so on electro-acoustic musical instruments, includes 1 transmitter and 1 receiver that delivers quality original sound and its max transmission distance can reach 30 meters / 98.4 feet. 4 SWITCHABLE CHANNELS: It has 4 channels and can support 4 groups of devices working in unison that you can enjoy in your music world. LESS THAN 4MS LATENCY: Ultra short delay and anti-interference for a wonderful music play. RECHARGEABLE BATTERY & 4H BATTERY LIFE: Built in rechargeable battery that takes only 2 hours to charge, provides a 4 hours battery life. PLUG & PLAY: Easy to connect and simple operation, user friendly wireless guitar transmission system. USB CHARGING CABLE SUPPLIED: Supplied with 1 USB cable for your convenience to recharge. POCKET SIZE & LIGHTWEIGHT: Compact and simple design, light weight and easy carrying. Package Includes: 1 X Transmitter 1 X Receiver 1 X USB Cable 1 X Instruction Book 【TRANSMISSION DISTANCE OF 50 METERS】 Supports 4 groups of devices to be used simultaneously, the maximum transmission range can reach 30 meters. 【PLUG AND PLAY】 You can start playing in seconds. Easy to use, small in size, lightweight and easy to carry. 【EASY USB CHARGING】 Built-in rechargeable lithium battery, long working time, equipped with USB cable, convenient charging. 【APPLICATION】 The wireless transmitter and receiver can be used for electro-acoustic musical instruments such as guitar, bass, violin, etc.