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Before operating the unit, please read these instructions carefully. 2. Retain this manual for future reference. 3. Do not remove any WARNING stickers on the unit. 4. You are advised to follow the instructions carefully when operating the unit. 5. Do not use any chemical solvent, cleaning agent or corrosive detergent to clean away dirt on the surface of the screen. By doing so, you may cause irreversible damage to the surface of the TFT screen. To clean o dirt or ngerprints, we recommend the use