1 Pair Built in Battery 10 Channels 5 Effects Wireless Guitar Effector Transmitter Receiver Features: 1. UHF wireless ID pairing technology, it can support 10 variable channels and supporting multiple groups in one frequency band at the same time. 2. With the output function of the headphones, you can practice five effects. 3. Supports power saving function. If there is no input signal for more than 5 minutes, it will automatically turn off, making it more environmentally friendly. 4. Compared with traditional analog technology, the unique digital signal processing technology is more sensitive to the sound of the instrument, lower noise and more personalized. 5. Suitable for parties, practice playing electric guitar, it is portable and easy to operate   Specification: Condition: Model: K380C Material: ABS Plastic Color: Mahogany Color Charging Time: Fast Charge: 1.5-2.5 Hours Standby Time: The Transmitter is about 4 Hours, and the Receiver is about 5 Hours Battery Capacity: Lithium Battery 800mA Input: The receiving box has an input function and can be connected to a mobile phone or a computer. Output: Headphones (independent practice experience) Function: Wireless Transceiver Transmission, Five Effect Functions, Headphone Output Function Suitable for Musical Instruments: Electric Guitars, Electric Guitars with Pickups, etc. Working Channels: 10 Reliable Wireless Distance: Approx. 15m / 49.2ft Wireless Transmission Technology: Digital Signal Processing Charging Socket: MicroUSB 5 Effects: Primal Clean, Bluesy, Flanger, Tremolo, Metal Weight: Approx. 286g / 10.1oz   Package List: 1 * Guitar Transmitter  1 * Receiver 1 * Double Head USB Charging Cable 1 * Cloth Bag 1 * User Manual