Item Type: Wireless Guitar System Product Material: ABS Use: Suitable for All Kinds of Guitars, Basses Or Musical Instruments with 6.35mm Sound Output Connector Battery Type: 2x 380mAh 3.7V Lithium Polymer Batteries (Receiver and Transmitter Shipped with Built in Batteries, One for Each Transmitter and Receiver) 16.35MM CONNECTOR: Transmitter and receiver come with 6.35mm connector and can be rotated within 60 degrees, which can be used for different interface positions. 2FIVE CHANNELS: Built in five channels, and five colors of LEDs corresponding to the display of different channels. 3DIRECT USE: The transmitter and receiver connection has been internally cured, no need to debug the code, can be used after power on. 4PROFESSIONAL TECHNOLOGY: Adopting U band frequency, FM lossless coding technology to realize perfect sound reproduction. Sound delay time is less than 1ms. 5LONG BATTERY LIFE: With 3.7V lithium polymer batteries, each with a capacity of 380mAh, you can play for hours without worrying about running out of power.1 x Transmitter 1 x Receiver 2 x Antenna 1 x USB Charging Cable 1 x User Manual