1)Strict QC 2)Focus on better 3100,000 speakers export yearly 4)1 year warranty 1% free spare parts 5)OEM/ODM welcome Bluetooth Active Speaker PML15AF-BT Features:Active speaker with Bluetooth, make your music experience easier,any electronic device with bluetooth will work, transimitter distance over 5 meters(depend device bluetooth quality), this can be done when you sitting comfortable and don ...