The Philips Sonicare DiamondClean Smart 9400 HX9917/88 is a sonic toothbrush designed to provide a comprehensive oral care routine through high-frequency vibrations. It generates 62,000 brush movements per minute, utilizing Sonicare Fluid Action to push water and toothpaste deep between teeth for a thorough clean. You can customize your experience using four brushing modes—Clean, White+, Deep Clean+, and Gum Health—and adjust the intensity across three different levels to suit your sensitivity. To help you maintain a safe technique, a visual light ring at the base of the handle alerts you if you apply too much pressure. The device also includes both zone change and completion timers to ensure every part of your mouth receives equal attention. For those who prefer digital tracking, Bluetooth connectivity allows the brush to synchronize with the Philips Sonicare app, providing insights into your brushing habits. This white model comes with a Li-ion battery that lasts up to 14 days on a single 24-hour charge from mains electricity. The package includes two oval-shaped heads with medium bristles—the All-in-One A3 and Premium Gum Care G3—alongside a charging glass and a travel case for convenient charging on the go. It is an ideal choice for anyone seeking a guided, data-driven approach to dental hygiene.