1. Sliding dimming function: Sliding dimming means that the lens transmittance can be switched by touching the tip of the right temple and sliding it back and forth. It switches between 5 levels in the range of 7% to 38% to accommodate various ambient light. 2. UV protection The lens has 99% UV (UVA/UVB) protection. Protects the user's eyes from ultraviolet rays. 3. Through the use of polarized lenses, this product has the following polarization functions: Anti-reflection of light from the ground, reflection from the surface of the water, reflection from the mirror, etc. 4. Anti-color function Because the base color of the lens is gray-brown, it can be expected that the visual heterochromia (redness, blueness, greenness, etc.) caused by colored lenses will be avoided to some extent, and the field of vision will be improved. 5. The temple part is equipped with a 52mAh lithium polymer battery, which can be used for 47 hours on a single charge. 6. Adopt magnetic charging design. When it is close to the connector, it can be glued automatically, and it can be fully charged in 30 minutes with a fast charging function. [Product details]: Sunglasses body: 1 piece Polarizer test card: 1 Soft case: 1 pc. Instruction manual and warranty card: 1 book Cleaning cloth: 1 piece Charging Cable: 1pc [Material]: Liquid crystal film lens, TAC, Frame: TR-90 Battery: Lithium polymer battery [Country of manufacture]: MADE IN CHINA [Cosmetic box size] :(approx.) length 100 mm× width 191 mm× height 60 mm [Product size] :(approx.) Height 51mm× Width 157mm× Temple length 164mm [Weight] :(approx.) 1 bottle 28.8g ○ Precautions for use ○ 1. Do not disassemble or repair this product. Doing so may result in a fire or malfunction. 2. Do not leave this unit in a place below -20°C or above 70°C. 3. Do not get it wet by soaking it in liquids or chemicals directly on the main unit. If liquid adheres to it, let it air dry in a dark place or use a hair dryer to dry it slowly at room temperature. 4. When wiping the lenses, wipe them dry with a glasses wipe. With a velvety cloth with good absorbent water, move the cloth in a certain direction and wipe gently without wiping too hard. Do not reciprocate and do not wipe in a circular motion. 5. The temples are made of lightweight synthetic material with a certain opening width. The temples should not be overly forceful or bent in the opposite direction. 6. Glasses are easy to deform, age, and break, so do not expose them to sunlight for a long time. 7. Keep the magnetic side of the charging cable away from metal objects, as there is a risk of short circuits due to magnetic suction of metal objects. 8. When not in use for a long time, put it in the glasses case, and be careful not to load or drop it. ●Please be careful● 1. Read all safety precautions before use. 2. The use of power sources, chargers, or batteries not approved by the manufacturer may result in a risk of fire, explosion, or other hazards. 3. Please note that the minimum transmittance of these sunglasses is 7%, which may affect the safety of driving, and we are not legally responsible for any accidents. 4. Use accessories approved by the manufacturer. 5. Use in the temperature range of -20°C-70°C, and store this unit and accessories at room temperature. If the ambient temperature is too high or too low, it may cause equipment failure. 6. This unit uses a built-in battery that is not removable. As this may damage the battery or the unit, do not replace the battery by yourself. 7. When charging is complete, remove the charger from the main unit and disconnect it from the power outlet. The continuous charging time should not exceed 12 hours. 8. Do not disassemble, strike, squeeze, or set fire to the battery. Also, if severe swelling occurs, do not continue to use it. 9. Do not place the product in a high-temperature environment. There is a risk of explosion due to overheating of the battery. 10. Be careful not to get the main unit wet. 11. If there is any abnormality in the main unit or other parts, please do not repair it by yourself. ●Disclaimer● The minimum transmittance is less than 8% when exposed to strong light, which can affect safety when driving. If you are wearing sunglasses in this state, we are not legally responsible. ● Warranty and after-sales service ● Please see the warranty card for the 7-day replacement warranty and 1-year type warranty.