Black Max AccuLine Tester is the only portable line tester on the market today, the Black Max AccuLine Tester is a precision fishing line tester specifically designed for the most serious big game fishermen. The Black Max allows the angler to check knot strength, ensure proper crimp integrity and verify IGFA pre-tested lines (record fishermen should not be without one). Features Include: State-of-the-art electronics; Peak weight hold; Test range from 2 lb. to 250 lb.; Lbs./kg. conversion; Water & shock proof carrying case; Weighs only 25 LB.; and Rechargeable batteries & A/C charger.