【Compact and Lightweight】-Aluminum body,High quality metal with a weight of 48g,and easy dial operation.The cold shoe mount compatible with various camera,suitable for any model of camera,especially serves well for people who use older Leicas, similar rangefinder cameras,SLR,etc.and also can mesure by hand hold. | 【Double energy saving】-Continuous metering for 12 hours(Built-in 120mAH lithium battery).Enter the low-power sleep mode after no operation for 25s,and click the button to wake.Automatic shutdown after sleep for about 3 hours.Use a 5V power supply to charge through the USB Type-C interface and it will be fully charged in about 40 minutes(take the USB interface of the computer as an example). | 【High precision】- About 30° average metering,single metering time ≤0.5s.Metering range: (ISO100) EV1~EV22;Aperture adjustment range: F1~F32;Shutter time adjustment range: 32s~1/8000s;ISO adjustment range: ISO6400~ISO5;Exposure compensation range: +3EV~-3EV. | 【A/T Mode Switching】- Double-click the button to switch between "A" mode and "T" mode, "A" means Aperture-priority mode. Set the aperture value through the dial.The minimum can be adjusted by 1/3 gear.The light meter calculates the recommended shutter time "T" means shutter time-priority mode.The shutter time can be set by dial.The minimum can be adjusted by 1/3 gear.The light meter calculates the recommended aperture value. | 【ISO Adjustment and Exposure Compensation Settings】- Double-click the key, and press the key for about 0.5s for the second time to switch to ISO adjustment. The minimum adjustment can be 1/3 gear Set ISO through dial. Double-click the key and press the key for about 3.5s for the second time to switch to the exposure compensation setting Set the exposure compensation by dial to change the recommended value calculated by the light meter. The minimum value can be adjusted by 1/3 EV.