Nikon 1 J4 Reference Manual

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The Camera Clock
The camera clock is less accurate than most watches and household
clocks. Check the clock regularly against more accurate time pieces
and reset as necessary.
The camera clock is powered by an independent, rechargeable
power source, which is charged as necessary when the main battery
is installed or the camera is powered by an optional EP-5E power
connector and EH-5b AC adapter (0 195). Three days of charging
will power the clock for about a month. If a message warning that
the clock is not set is displayed when the camera is turned on, the
clock battery is exhausted and the clock has been reset. Set the
clock to the correct time and date.

Nikon 1 J4 Specifications

General

Sensor	CMOS
Sensor Size	13.2 x 8.8 mm
Image Sensor Format	CX
Image Processor	EXPEED 4A
Built-in Flash	Yes
External Flash	No
Storage Media	microSD, microSDHC, microSDXC
Connectivity	Wi-Fi
ISO Range	ISO 160-12800
Shutter Speed	1/16000 to 30 sec
Autofocus System	Hybrid AF
Number of Focus Points	171
Continuous Shooting Speed	Up to 20 fps with autofocus
Video Recording	Full HD 1080/60p
Screen	3.0 inch TFT LCD
Battery	EN-EL22 rechargeable Li-ion
Battery Life	Approx. 300 shots
Weight	Approx. 232 g with battery and memory card