Instruction Manual
Page 168
... by bulb shooting in low temperatures. no indication/mark appears when batteries are just about exhausted; blinking M indicates batteries are completely exhausted or improperly installed Dimensions (WxHxD) Approx. 158 x 149 x 79mm or 6.2 x 5.9 x 3.1 inches Weight Approx. 1,210g or 42.7 oz. (without notice.
... by bulb shooting in low temperatures. no indication/mark appears when batteries are just about exhausted; blinking M indicates batteries are completely exhausted or improperly installed Dimensions (WxHxD) Approx. 158 x 149 x 79mm or 6.2 x 5.9 x 3.1 inches Weight Approx. 1,210g or 42.7 oz. (without notice.