Features: brand new and high quality Upgrade audio DSP chip,can adjust the rhythm,the audio signal is more clear,the output sound clear and beautiful. Aspecial microphone cable support for 48v 3.5mm interface to use ,it is more convenient. Built-in upgraded version of bluetooth-compatible module, fully support mobile phone/pad and the other digital products with bluetooth-compatible. High compatibility,supports most mainstream system:Android,win7,win10,could be used with 500+APP in the market. 1800mAh battery capacity,12hours Live for time,24hours standby. Specifications: Material:Metal Size:23x14.5cm/9.06x5.71in Color:Black; Battery Capacity:1800mAh Live Time:About 12 Hours Standby:About 24Hours Charging Time:About 2Hours Package Includes: 1xSound Card 1x Charging Cable 1x USB Cable note: Please allow 0-2cm 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. Thank you!