... has long working time OEM&ODM ♣SpecificationProduct nameBluetooth receiver for pc Model NO.JH-M3037MaterialRubberized finishColorRed, blue, purple, orange, black, etc ... A2DP V1.2Optional powered directly with power adapter or by PC USB portOptional embeded battery which has long working life ♣ Packaging ... : 30*25*25cm40pcs/CTN 4.8kg/CTN Bluetooth receiver for pc