Features: Wireless transmitter and receiver set, suitable for electro-acoustic instruments such as guitars and bass. UHF 730MHz original sound transmission, interference-resistant and ultra-low delay, delivering high-quality audio performance. Supports up to 4 devices operating simultaneously in one-to-one mode; maximum transmission distance up to 50 meters in open space. Built-in rechargeable lithium battery for extended usage; includes USB charging cable for convenient charging. Plug-and-play design for easy operation; compact and lightweight for portability. Specifications: Color: Black Material: ABS Audio frequency response: 20Hz - 20kHz Frequency: UHF 730MHz Transmission range: Up to 50m (open space), up to 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) Unit weight: 35g (1.2oz) per piece Package includes: 1 x Transmitter 1 x Receiver 1 x User Manual 1 x USB Charging Cable Note: The package includes only the items listed above. Guitar, amplifier, and other accessories shown in images are not included. Color may vary slightly due to lighting and monitor settings. Allowable measurement deviation: 1-3cm.