Vivitar VIV-PG-5DMII - Manual (Page 18)

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Specifications
Type: Battery grip for the EOS 5D Mark II
Power Sources: (1) Battery Pack LP-E6
(2) AA size batteries: Alkaline batteries
(3) AC adapter kit ACK-E2 (not included)
Power Switch: Camera’s power switch
Dimensions: 149.1 (w) x 114.3 (H) x 76.3 (D) mm / 5.9(w) x 4.5(H) x 3(D) inches
Weight: Approximately 315g/11.1 oz.