Features: Wireless transmitter and receiver set, suitable for electro-acoustic instruments such as guitars and bass. UHF 730MHz original sound transmission, anti-interference and ultra-short delay, delivers high-quality audio performance. Supports up to 4 devices operating simultaneously in one-to-one mode; maximum transmission distance up to 50 meters (line of sight). Built-in rechargeable lithium battery provides long operating time; includes USB charging cable for convenient charging. Plug-and-play design, easy to use; compact and lightweight for portability. Specifications: Color: Black Material: ABS Audio frequency response range: 20Hz - 20kHz Frequency: UHF 730MHz Transmission range: Up to 50m (open area), 30m (through walls) Transmission delay: Less than 4ms Power supply: Built-in rechargeable lithium battery 3.7V 600mAh Charging port: Micro-USB Unit size: 11 x 4.5 x 1.5 cm (4.3 x 1.8 x 0.6 inches) Weight: 35g (1.2 oz) per unit Package List: 1 x Transmitter 1 x Receiver 1 x User Manual 1 x USB Charging Cable Note: The package includes only the items listed. Guitar, amplifier, and other accessories shown in images are not included. Color may vary slightly due to photography lighting and monitor settings. Allowable measurement error: 1-3 cm.