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 in one-to-one mode; maximum transmission distance up to 50 meters (line of sight). Built-in rechargeable lithium battery for extended use; includes USB charging cable for convenient charging. Plug and play design, easy to operate; compact and lightweight for portability. Specifications: Color: Black Material: ABS o frequency response range: 20Hz - 20kHz Frequency band: 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 dimensions: 11 x 4.5 x 1.5cm (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: Package content includes only the items listed and does not include any other accessories. Guitar, amplifier, or other equipment shown in images are not included. Photographic lighting and monitor settings may cause slight color variations between the image and the actual product. Allowable measurement tolerance: ±1-3cm.