Features: BLE 5.0 protocol, 10m wireless transmission distance,fast transmission and low power consumption. Wireless bluetooth-compatible speaker, one-click hands-free answering, compact and easy to carry, convenient to use. Large capacity 400mAh lithium-ion battery, long service life, supports u disk, TF card, aux output. Made of high quality ABS and electronic components material, durable. 360-Degree surround high-fidelity sound,3W speaker, great for home, office, etc. Specifications: Material: ABS, Electronic Component Color: White, Black, Blue, Pink, Green(optional) Size: Approx. 70x110x50 mm/2.75x4.33x1.96 inch Output Power: 3W Channel: 2-channel Power Supply: Built-in lithium battery Battery Capacity: 3.7V 400mAh Frequency Response: 50Hz-20KHz Transmission Distance: 10m Interface Type: USB BLE Version: BT 5.0 Charging Time: 2-3 Hrs Working Time: about 2 hours Expandable Storage: U Disk, TF Card, Aux Output SNR: ≥ 90dB Package Includes: 1 Piece Retro Speaker note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you mind. Due to the difference between different monitors, the picture may not reflect the actual color of the item.