Saeshin Controller Strong B135 USER INSTRUCTIONS & SAFETY TIPS To ensure your device functions safely and reliably, and to maintain the validity of your warranty, please follow the operating guidelines below.Please note: Damage resulting from misuse, improper operation, or failure to follow these instructions will not be covered under warranty. Direction Change Always reduce the RPM to “0” before switching rotation direction (from Forward to Reverse or vice versa). Switching directions at high speed can damage the motor and internal parts. Handpiece Use Never turn on the device without a nail bit inserted in the handpiece. Always keep a nail bit or a dummy bit inserted when the machine is turned off to protect the handpiece spindle from damage over time. Power Use Turn off the device completely when not in use, even between clients. At the end of each day, power off and unplug the machine to prevent overheating and extend its lifespan. Additional Tips Keep ventilation areas free of dust and obstructions. Use only compatible handpieces and certified accessories. Clean and disinfect your e-file regularly for hygiene and peak performance.