Material: ABS Parts List: Visual Ultrasonic Scaler*1pcs 304 Stainless Steel Cleaning Head*4pcs Metal Wrench *1pcs Wireless charging base *1pcs Type-C charging cable *lpcs Instruction manual *1pcs APP QR code card * 1 PCS Advanced electronic control system makes the operation more concise and convenient Strong vibration can remove smoke stains, stains of tea and dental calculus on the teeth through vibration mode With a 30W ultra-high definition camera, you can clearly understand the inside of the oral cavity by connecting to mobile phone WiFi Four working modes (Low, Medium, High, Strong) correspond to four mode indicators When the dental light is on, the blue light is always on, the red light is flashing when charging and the red light is always on and does not flash when fully charged. 1st gear 4500 rpm 2nd gear 9000 rpm 3rd gear 13500 rpm 4th gear 18000 rpm automatic switching In shutdown state, press and hold the power button for 3S, the default mode is 1, low, and the tooth light is green Click the function key to switch mode (functions), and 4 modes are cycled via Mode 1: 25% continuous output (soft mode) Mode 2: 50% Continuous Output (White Mode) Mode 3: 75% Continuous Output (Strong Mode) Mode 4: 100% continuous output (enhanced mode) Charging does not work, charging is not fully charged, the mode indicator lights up gradually, and it is always red when fully charged . When the battery is too low, it stops working and the 4 mode lights flash 5 times at a frequency of 1HZ to automatically shut down. Normal working voltage: 3.7V 1.2A. When the battery is insufficient, the voltage is lower than: 3.7V, and the first gear will be reduced to 4500. Rechargeable and eco-friendly