10721938_ony_HDW_F900R_HDCAM_Camcorders__Benefits_
[Features:] Internal Light System [Benefits:] 
A two-pin socket provides up to 50 watts of power from the attached lithium-ion battery. This can be used to power a variety of ancillary devices, including a front-light that can be mounted on the upper part of the handle. The power can be switched on and off manually or, when in Auto mode, it can be set to be synchronized with the operation of the Record button.
Sony HDW-F900R HDCAM Camcorders
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