31000 times/min high frequency, 3 brushing modes, 2min auto-timer, Charging time: 3 – 4h, Usage time: 5 weeks, Battery: 400mAh Ni-Cd battery.
Basically copy coupon, view price history or create e-mail price alert. What is 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 and price update (UTC):
Banggood
Banggood warehouse is located in China. There is one great coupon!
Link: Banggood product page
1. ($34.35): BG75597c
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 502C6B, HHHHHOT, healthylifestyle, 89275e, ML15%Pro, vipupgrade8, 0e7f33, BGTMCB7, BGHB20, BGSD58965, BGAFF10OFF, BGCuponation10, 13f142, BGHONEY2110, BG10OFFAFF, BGwhielabel, BG10OFFAFF1, BANGGOODSD, BGHealth06, BGHealth10D, 2022ACTIESNL, BGHB218, 2203ActiesNL, tRaDetRaCKeR, BGHECARE1, BG4ee866, DealBGimpact, Cuponation9, 9OFFSUMMER
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 2 another warehouse/versions!
1. China – LANSUNG U1 Sonic Toothbrush Pink ($-3)
2. China – LANSUNG U1 Sonic Toothbrush Purple ($-3)
Price history and price alert
Here is price history (for all/most countries) for LANSUNG U1 Sonic Toothbrush. The lowest price was: $7.99.
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)).