Features: brand new and high quality Portable wireless speaker with built-in Bluetooth-compatible 5.0 achieves wireless transmission and quick pairing with any bluetooth-enabled device. Built in 300 mAh large capacity Lithium-Cobalt battery enables you enjoy music for a long for time continuously. With 40 mm sound units and diaphrams, this cellphone speaker creats professional cinema class stereo sound effect for you. Equipped with durable buttons, enabling easy operation and application. Compact and mini design and equipped anti-lost rope achieve high portability and loss prevention. Specifications: Material: ABS Size: 12x6x3 for cm/4.72x2.36x1.18 inches Approx. Charging Mode: USB Charging Duration: 2 Hours Standby Duration: 60 Days+ Color: Black/White Sound Unit Diameter: 40 mm/1.57 inches Approx. Bluetooth-Compatible Version: 5.0 Battery: 300 mAh Bluetooth-compatible Transmission Distance: 10-15 Meters/32.80-49.21ft Approx. (Under Obstacle-Free Circumstance) Package Includes: 1xBluetooth-compatible Speaker note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.