Olympus DL38 plus, Sound level meter SOUND PRO, SP-DL-2-I/ 3/ 10, FARWEST, SKU-1000, EBAN 4000 type C4010, Eban C4001, C4002, C4003, C4004, C4005, C4006, C4007 . EMAIL : karyamitrausaha@ yahoo.com ....