Shipping Policy : Battery Not Included During the Shipping Product Description： ◆ The Window Tint Meter is applicable to measure the transmittance of all kinds of transparent, translucent samples with parallel plane (such as automobile manufacturing, aerospace, glass products, plastic sheet, sheet, etc). Also can be used to determine the turbidity or clarity of liquid sample (water, drinks and so on). Product Feature： ◆ This Window Tint Meter is a hand held device that measures the amount of light that passes through a window. ◆ Technology is designed in accordance with GB 2410-80, ASTM D1033-61, JIS k7105-81 and other standards. ◆ Digital display, wide measurement range, high resolution. ◆ One key calibration, easy to use. ◆ Solid structure, exquisite, easy to carry, small volume, light weight. Technical Specifications ◆ Measuring range: 0 to 100% Light Transmission ◆ Resolution: 0.1 ◆ Accuracy: ±2% ◆ Light Source: LED ◆ Sample Thickness: Less than 18 mm/0.7inch ◆ Operating Conditions: Temperature : 0~50°C; Humidity: below 90% RH ◆ Power Supply: Main Unit: 2x1.5v Um-4 Battery;Light Emitter: 2x1.5v Um-4 Battery（Battery Not Included in the Package） ◆ Size: Main Unit: 141x65x38mm;Light Emitter: 70x62x52mm ◆ Weight:290 g(Not including batteries) ◆ Accessories:Main Unit ;Light Emitter;Carrying Case;Operation Manual