Identification of coins under violet light: Counterfeit money does not fluoresce. 1. Authentic paper money absorbs light without reflection; counterfeit paper money has a strong bluish-white reflection light. 2. Counterfeit currency has an obvious watermark on the head or design, but real currency does not. 3. The surface of the discriminator should be kept clean, especially in the detection slot. 4. After checking the banknotes, please turn off the device. If you do not use it for a long time, please unplug it, so as not to affect the service life of the machine. 5. It is strictly forbidden to wash the discriminator shell with water to avoid malfunction. 6. When the discriminator does not work properly, please turn it off and restart it. If it is invalid, you should contact the manufacturer in time. Make any adjustments on the machine, so as not to affect the performance of the discriminator. (The product does not include batteries) 7. During transportation and use, avoid strong vibration of the machine, so as not to affect the performance of the discriminator. 8. The discriminator is a high-precision instrument and users are not allowed to disassemble it by themselves.