Color White/Black, Battery Life 28 Days, LCD Screen Display 0.96” TFT-LCD, Maximum Torque 408 gf.cm, Battery Life 28 Days, Brush Head Identification NFC Tag (NTAG213) Chip, Smart Power on Movement Detection, Clean Frequency 42000 times/min, Charge Capability 100% charge in 3.5 Hours with Default Charger, Charging Mode Wireless Charging / Compatible with Qi Chargers, Vibration Mechanism Sonic Oscillation, Brand Evowera, Sensitive Oral Area Define Support, Motor Servo Motor, Stress Intensity Level Continuous Variable Force Adjustment, Clean Mode Adaptive Mode + Five Basic Cleaning Modes.
Basically copy coupon, view price history or create e-mail price alert. Best price?
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. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
1. ($178.59): BG589b2e
you should apply the coupon in your 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): BGd1b10e, BG4ee866, BGEVO026, BG8ReviTrage, BGa49475, Cuponation9, 9OFFSUMMER, BGd0af99, BG75597c, BG42d474, BGc1cd3c, BGc37323, JanBGCoupon8, BGSaleFeb8, BGSaleAD, BG0328d, BGgh0418h, BGMARCHSALE
(there’s a little possibility that old coupon will work)
Price history and price alert
Do you need price history chart (for all/most countries) for Evowera Planck O1 Electric Sonic Toothbrush? There we go. The lowest price was: $103.99.
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)).