316F Stainless Steel Cleaning Needle Wide Head Cleaning Needle: Cleans Tooth Surface and Large Pieces of Tartar Sharp Head Cleaning Needle: Cleans Tooth Crevices and Small Pieces of Tartar Teeth Clean Without Damage Genuine Ultrasonic Technology, Upgraded with Multiple Accessories for a More Comfortable Cleaning Experience Intelligent Ultrasonic Recognition, Not Afraid of Hurting Gums Automatic Frequency Lock Matching and Cleaning Needle Vibration Frequency Maintains a High Level of Cleaning Effectiveness Ultrasonic Enhancement for Stronger Cleaning Force, 270Wx Sound Frequency Upgraded LED Spotlight for Clearer Cleaning Guidance, Use with Dental Mirror for Precise Cleaning in All Areas Specially Designed for Home Use, Easy to Operate Automatic Power-off Protection to Prevent Needle Overheating, After 10 Minutes of Continuous Operation, Automatic Shutdown, Wait 60 Seconds Before Restarting.