Waterproof Level: IPX7, Main Power: 2.5W, Product Name: Ocean Air 2 Smart Sonic Electric Toothbrush, 2. 5 hours full charge for 40 days of battery life, Mode: Gentle (Default Mode), Brush Head: Magnetic brushless moto, Input: 5V / 0.5A, Clean, Motor: Magnetic brushless motor, Weight: 95g (Including toothbrush body and head), Charging Specification: USB Magnetic Charging, Size: 235x 24mm.
Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the 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 coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. You can get coupon down below.
Link: Banggood product page
1. ($45.04): BG75597c
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): BgcLuBofErtA10, BGOC279, BGAIR229, BGAIR2499, BGAR3677, BGAFF10OFF, BGCuponation10, BG22371, BG10OFFAFF, BGwhielabel, BG10OFFAFF1, BGHB218, BGXPAP293, 2203ActiesNL, BGHUMA051, BGHECARE1, BG5a9339, BG4ee866, BGHOM020, BGHUXC023, BGcd7367, Cuponation9, BG36a004, 9OFFSUMMER, BG153121, BG989d84, BGf4eef2, BG3fc3f7, BG606174, BGcc265b
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for Oclean Air 2 Sonic Toothbrush. The lowest price was: $22.99.
Price records source(s): Gearbest, 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)).