Genuine Dell RM948, 0RM948 365 128 Bit 2.4 GHz Bluetooth Mini Card Module For Studio 1450, 1457, 1458, 1557, 1558, 1569, 1745, 1747, 1749, 15r, Vostro 1220, 3300,3 400, 3500, 3700, V13, Inspiron 11z, 1110, 1320, 1370, 1440, 1464, 1470, 1570, 1545, 1546, 1564, 1750, 1764, M4010, N4010, M5010, N5010, M5030, N5030, N5020, Latitude XT2, E4300, E4200, Alienware M11X Systems Compatible Part Numbers: RM948/ 0RM948 CRD, WRLES, INT, BLTH, 365, SFX, NBK