Features: brand new and high quality Portable wireless speaker with built-in Bluetooth-compatible 4.1 achieves wireless transmission and quick pairing with any bluetooth-enabled device. Built in 2x600 mAh large capacity battery enables you enjoy music for a long for time continuously. Palm-sized design achieves high portablity. With detachable magnetic design in spherical shape, it can be split in 2 speakers or used in combination according to your actual needs. Equipped with 40 mm full frequency stereo sound units with dual channels, enabling you enjoy cinema-class 3D sound effect. Specifications: Battery Capacity: 3.5V/600mAhx2 Frequency Response Range: 100hz-20khz Output Power: 2.5 Signal To Noise Ratio: ≥75db Power Supply Mode: Built-in Lithium Battery Channel: 2.1 Playing Time: 4 Hours Expansion Storage: 4 GB Bluetooth-Compatible Protocol: 4.2 Quantity Of Speakers: 2 Effective Distance: 10 Meters/32.80 ft Approx. for Shell Material: ABS + Aluminum Alloy + Cloth Mesh Is There A Radio Function: Yes Size: 90x90x92mm/3.54x3.54x3.62 inches Approx. Color: Black/for Grey/Red 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.