JTC Combination Electronic Stethoscope Kit JTC 1449 SANWA MG1000 DRIVE CAPACITY L(mm) CTN (PCS) Available Options:GM101 ( Complete 4.0Ah ) DRIVE CAPACITY L(mm) CTN (PCS) ANAF0803 1 4" 6 30Nm 350 20 ANAF1203 3 8" 6 30Nm 350 20 ANAF1211 3 8" 20 110Nm 385 12 ANAF1621 1 2" 40 210Nm 535 10 ANAF1635 1 2" 70 350Nm 645 6 ANAF2450 3 4" 100 500Nm 865 4 ANAF2470 3 4" 140 700Nm 1092 4 ANAF2498 3 4" 140 980Nm 1230 2 ANAF3298 1" 140 980Nm 1230 2 DRIVE CAPACITY L(mm) CTN (PCS) ANAG0825 1 4" 40 250in LB 350 20 ANAG1225 3 8" 40 250in LB 350 20 ANAG1208 3 8" 15 80Ft LB 385 12 ANAG1615 1 2" 30 150Ft LB 535 10 ANAG1625 1 2" 50 250Ft LB 645 6 ANAG2430 3 4" 50 300Ft LB 865 4 ANAG2460 3 4" 100 600Ft LB 1092 4 ANAG2470 3 4" 100 700Ft LB 1230 2 ANAG3270 1" 100 700Ft LB 1230 2 sensitive tool to locate and identify noise Cushioned headphones