This is a BOSS wireless system for guitars, offering stable sound quality. - Brand: BOSS - Model: Wireless System - Accessories: USB cable Thank you for viewing. I've only used it a couple of times in the studio after purchase, so I think it's in relatively good condition. I didn't end up using it for live performances because I mostly play in small live houses (tears). Thank you for your consideration! 【Product Description】 ■ A wireless system that can be used immediately by simply connecting it to a guitar, bass, or electronic instrument. ■ Automatically establishes the optimal wireless connection by docking the transmitter to the receiver for about 10 seconds. ■ BOSS's proprietary wireless technology provides high-quality sound and stable connection with an ultra-low latency of 2.3ms (transmission range: 15m *1) ■ Rechargeable built-in battery allows for up to 7 hours of continuous use *2 ■ Easy to charge with a general-purpose USB adapter (5V/500mA or more) *1 Varies depending on the usage environment. *2 When fully charged, the transmitter can be used for approximately 12 hours and the receiver for approximately 7 hours. ■ Wireless communication format: Digital audio using BOSS's proprietary method ■ Wireless carrier frequency: 2.4GHz ■ Maximum number of simultaneous channels: 14 (varies depending on the usage environment) ■ Transmission range: 15m line of sight (varies depending on the usage environment) ■ Indicators: POWER indicator (also used for battery check) RECEIVE indicator ■ Connection terminals Output terminal: TRS standard type TRANSMITTER terminal: TRS standard type DC IN 5V terminal: USB Micro-B type ■ Power supply: Rechargeable lithium-ion battery (obtained from DC IN 5V terminal) ■ Current consumption During wireless operation: 60mA During charging: 500mA ■ Battery charging time Charging the receiver only: Approximately 3 hours Charging the transmitter and receiver simultaneously: Approximately 4 hours ■ Continuous battery life: Approximately 7 hours ■ External dimensions: 87 (width) x 25 (depth) x 38 (height) mm ■ Weight: 60g