Rated Power 3W, Vibration Frequency 31000 VPM, Size 187x 29.5x 29mm, Power Warning Battery level indicator show when you need to charge, Material ABS, Color Pink & White, Waterproof IPX7, Work Noise Less than 65 dB, Use Time 2 weeks, Charging Mode Inductive charging, Brand Mornwell D02, Charging Time 24 hours.
Just check coupons out (with price alert and history). Do you want to know what the best price is?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($5.99): BGdcDDYS02
2. ($23.01): BG589b2e
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG45384e, BG75597c, BG3371b8
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Check out price history chart (for all/most countries) for Mornwell D02 Sonic Toothbrush. The lowest price was: $5.99.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).