NIER MBOX Portable Mini Bluetooth speaker with Aluminum Housing, 5W Powerful Sound,1000mAh battery(Black) Real 5 Watt Mini Bluetooth Speaker with Clear and powerful sound Strong aluminum housing with 2mm thickness and CNC process Build-in 1000mAh A-class battery support playback up to 8hours When in active Bluetooth mode, the Mbox Speaker can be used to answer or reject incoming calls and redial numbers Broad compatibility: Just Connect and start pairing with any bluetooth-enabled devices to playback