Features:Long standby , continuous metering for 26 hours.High accurancy, 0.1100,000 .32-bit MCU with high accurancy sensing.Support reflection metering, incident metering.Support multiple -ports.Parameter memory function.Adjustable reflectivity.Specifications:Metering angle: 45 average metering (default reflected light, can also be set to incident light)Display screen: 0.96 inch 0LED: 3.7V, 300mAhAperture : F1.0F64Shutter : 30S1/8000SWorking current: 8mA10mAStandby current: 3.5AReflected EV : -2.019.0Incident EV : -4.515.5Exposure compensation : -5.0+5.0Three elements of exposure (gear description):Aperture F, the of gear can be set as follows:F/1.0, 1.2, 1.4, 1.8, 2.0, 2.5, 2.8, 3.2, 3.6, 4.0, 4.5, 5.0, 5.6, 6.3, 6.7, 7.1, 8.0, 9.0, 9.5, 10, 11, 13, 14, 16, 18, 19, 20, 22, 25, 29, 32, 45, 64Shutter T, the of gear can be set as follows:30s, 15, 8, 4, 3, 2, 1.6, 1.3, 1, 1/2, 1/3, 1/4, 1/5, 1/6, 1/8, 1/10, 1/13, 1/15, 1/20, 1/25, 1/30, 1/40, 1/50,1 /60, 1/80, 1/100, 1/125, 1/160, 1/200, 1/250,1 /320, 1/400, 1/500, 1/640, 1/800, 1/1000, 1/1250, 1/1600, 1/2000, 1/4000, 1/8000sSensitivity IS0, the of gear can be set as follows:6, 8, 10, 12, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 160, 200, 250, 320, 400, 500, 640, 800, 1000, 1600, 3200, 6400, 8000Package size: 180 * 130 * 60mm / 7.1 * 5.1 * 2.4inPackage weight: 160gInstructions:1. After receiving the goods, it is recommended to fully c-harge it before using2. Metering: continuous metering starts when it is turned on, and stops metering when turned off.3. The operation dial on the right rear side of the machine has three operation modes, press forward, press backward, and press inward (leftward).4. Selection of priority mode: operate the dial to go in (left) and press to modify the priority mode.5. When the screen- points to the aperture value, it indicates the aperture priority mode. Press the dial forward or backward to increase or decrease the value. Long press the dial forward or backward to quickly adjust the value.6. The- on the screen points to the shutter , indicating the shutter priority mode, the same dial can adjust the value.7. Long press the dial in (left) for more than 1 second to set the sensitivity. At this , the screen- points to ISO. Press again to exit the sensitivity setting. When the sensitivity is set, the machine can also measure light continuously.Packing List:1 * Light Meter1 * Cable1* charger