Dear Customer4. Prevent device from falling, friction, or crashing against hard objects during use, otherwise surface scratch, battery disconnection, data loss or other hardware damages will be caused. Please also avoid violent vibration or impact.Security Instructions1. Don't repair or modify the device without permission. None of the parts in this device could be checked or repaired by the user. Only professionals are entitled to check or repair this device. If the user dismantles it and modify its internal circuit personally, it will make it difficult for our serviceman to repair, and may possibly impacts its performance and quality.2. Please don't use this device in extremely hot, cold, dusty or humid circumstances.3. This device might get warm during charging.5. Please enjoy the music in a proper volume to avoid impairing your hearing and damaging the sound system. Before plugging your headphones into the device, please firstly turn down the volume. 6. Don't clean this device with chemicals or detergents, otherwise its surface and top coating may be damaged.Thank you for purchasing the M2X portable music player. We'd like to take the opportunity to express our sincere gratitude to you. You are recommended to read the user manual carefully before operating the device. Please keep this user manual for future reference.7. Don't disconnect this device during formatting or transferring files. otherwise, a program error may occur.8. The USB port is only for data transmission or charging. Please try to avoid using this device when it is charging.9. When this device is not in use, please charge it regularly to guarantee battery life.10. Please replace the battery only with ones of the same type as the original ones, as improper replacement will bring the risk of explosion.11. Never expose battery to sunlight, fire or other extremely hot circumstances.12. Please download update file from our official site, and update accordingly to the instruction. www.shanling.comENGLISH