Accusplit AX740SBLKIT PRO MEMORY (50) Digital Stopwatch with Rechargeable Battery & 3 Way Recharger Kit Industry Proven Ergonomically Correct Case Design Exclusively From ACCUSPLIT NEW Rechargeable Lithium Battery LiR2450 Provides Over 3 Months Power without Using the Backlight AND 500 recharges On Demand LED Backlight-10 Minutes per Activation with 10 Hours of Continuous Use Twin Master Control Buttons Give Anatomically Correct Operation of the Start-Split Function in the Left or Right Hand New 3 Way Recharger Kit Includes-AC USB 12v Car Socket