The PVS-31C utilizes a single CR123 or AA battery. This unit has a ton of features that make it an awesome value! It has articulation like the so you can fold and stow it against your head, or fold one side up to get behind your optic. It also features auto on/off when articulating. You can purchase the LEMO adapter to run battery packs as well.

Optical Magnification: 1X (Unity)

Field-Of-View (FOV): 40°

Focusing Range: 0.25m .. Infinity

Diopter Adjustment Range: -6 .. +4

Interpupillary Adjustment Range: 50mm .. 90mm

Built-In IR Illuminator: Yes

Momentary IR-On Button: Yes

IR-On Indicator: Yes

Manual Gain Control: Optional *

Light Overload Protection: Yes: Automatic Shut-Off

Any Polarity Battery Insertion: Yes

Stow Safety Feature: Optional

Power Source: 1pc AA or 1pc CR123

Battery Life: Up to 40 hours

External Power Supply Voltage: 4VDC .. 16VDC

Operating Temperature: -40°C .. +50°C