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 o performance. Supports up to 4 devices operating simultaneously with one-to-one pairing; maximum transmission distance up to 50 meters in open space. Built-in rechargeable lithium battery provides extended working time; includes USB charging cable for convenient charging. Plug and play design, easy to operate; compact and lightweight for portability. Specification: Color: Black Material: ABS o frequency response range: 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 Item size: 11 x 4.5 x 1.5cm (4.3 x 1.8 x 0.6 inches) Item weight: 35g (1.2oz) per piece 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 above. Guitar, amplifier, and other accessories shown in images are not included. Color and size may vary slightly due to lighting and display differences. Measurement error is permitted within +/- 1-3cm.