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4 Battery life: Alkaline battery: Approx. 500 times Rated voltage: DC6V 4W( : Direct Current) Outside dimensions: 129mm(W).152mm(H).121mm(D) Weight: Unit: Approx. 400g(without batteries) Cuff: Approx. 150g SPECIFICATIONS . 7 memories function . Easy-to-read LCD display . Compact & light weight . Automatic power off function . Automatic measuring function . AC adapter is optional (AC-230CZ) CH-403C Compact automatic inflation Blood Pressure Monitor with 7 memories Measurement System: Oscillometri