* 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, small volume, light weight, exquisite, easy to carry. * Continuous measuring mode. * Use “USB data output” and “RS-232 data output” to connect with PC. * Provide “Bluetooth ™ data output” choice.