This product is the AstrHori "XH-2". I purchased it new, but I haven't used it at all, so I'm putting it up for sale. The following is from the shop: Features AstrHori's "XH-2" is a light meter made of brass, offering excellent operability, visibility, and portability. It fits perfectly on cameras without a built-in light meter and can be attached to the camera's accessory shoe or used as a standalone unit. The operation modes, aperture priority (A) and shutter speed priority (T), can be easily switched with a double-click, allowing for precise adjustments in 1/3-stop increments. It features a 0.66-inch organic EL display for clear information display. It also automatically enters sleep mode when not in use and restarts instantly with a button click. The built-in 80mAh lithium battery allows for approximately 10 hours of continuous use, and it is available in black and silver. Specifications Metering Range: 【ISO 100】EV1 (1 second F1.0) to EV22 (1/4000 second F32) ISO Sensitivity Setting Range: ISO 5 to ISO 6400 (1/3-stop increments) Shutter Speed Setting Range: 30 seconds to 1/8000 second (1/3-stop increments) Aperture Setting Range: F1 to F32 (1/3-stop increments) Angle of Acceptance: Approximately 30 degrees (reflected light type) Metering Mode: Averaging metering Light-receiving Element: Silicon photodiode Material: Brass 0.66-inch organic EL display Battery Type: Built-in 80mAh Li-ion battery Duration: Approximately 10 hours of continuous use Charging Time: Approximately 30 minutes Size: Approximately 43 x 27 x 23mm Accessories: USB cable Type A to C Weight: Approximately 62g Manufacturer's Warranty: 2 years