Duration About 25 days, Rated voltage 1.2V—, Rated power 0.5W, Net weight 50g, Name SO WHITE sonic electric toothbrush, Model EX3, Charging time It takes about 16 hours to fully charge, Brand SO WHITE XIAOMI Ecological Chain Brand, Rated input 5V.
Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
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. Only one coupon available!
Link: Banggood product page
1. ($36.43): BGHB218
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): HHHHHOT, 502C6B, XMSTB, 1199XM, 89275e, ShinyLife, BGSOWHITE, BG15%SP, BGHU211, BGBW1199, BGRU1199, BGILMI11, BGIS1199, 3d5e03, BGDEEX3, BGCFC03, BGDlzMIX7, BGbuywithus536, BGPSEX30, BGCouponsfromchina13, BGSZCZ879, BGhome2, BGILNEW, BGSOEX30, BGEX3RAC, BGEX3GWTR, BGSmartbuy07, BGEX3LM8, AFfbG10, vipupgrade8, BGAUGEX3, BGEX399, BGSOOCASPL, BGSOWRA, BGWHITEPL, BGHU355, BGEX3SEP, BGSOOCASSEP, BGEX3S88, BGkonimbesinSSO, BGSmartbuyWT, BGEX3OCT, BGBFCR48, BGSONICPL, BGEX3NOV1, BGDouble11HC, BGZUZUSS9, BGSPV1, BGPL11SO, BGPBF1, BGCPSOWHITE, BGBFHC3, BG6BG66, BG11VIPD, BGSOO2, BG9922, BGTB899, BGTTB99, BGBN2, 0e7f33, BG30536, BGIL999, BGSOC66, BGSOOCAS18, FBCOUPON1, BGAFF10OFF, BGTT10, bGhOnEy10, BGsccn20, BGsctb12, BGbeauty001, BG2dfcd7, BGSSTH, BGJULYTB, BG70536, BGXIAOMI811, BGTSB01, BG11025, BGHB20, BGSD58965, BgcLuBofErtA10, BG7006, BGWRY10, BGHUYDJ32, BGHUD123, BGCC0704, BGHBHJ104, BGSOOCA1, BGCuponation10, BGSOOCASD, 13f142, BGHONEY2110, BG10OFFAFF, BGwhielabel, BGSOOCASA, BGAHM70536, BGahm7053, BGG70536, BG0d130c, BG4b73b6, BG10OFFAFF1, BG32519d, BANGGOODSD, BG1fe092, BGHealth06, BG3ce568, BGAH252, BG27a1b2, BGHealth10D, 2022ACTIESNL, BGHU1740, BGHUMA13, BGXPAP72, tRaDetRaCKeR, BGHECARE1, BG1ce1b7, BG4ee866, BGHOM044, BGHUXC048, BG233741, BG8ReviTrage, BG9876fa, BG33fec2, Cuponation9, BG197ba5, 9OFFSUMMER, BG75597c, BG5c4ead, BG474295, BGb8b728, BGdc0324b, BG0331a, BGgh0421g
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 4 another warehouse/versions!
1. Hong Kong – Xiaomi EX3 SO WHITE Sonic Toothbrush Blue ($-3)
2. China – Xiaomi EX3 SO WHITE Sonic Toothbrush Pink ($-3)
3. Hong Kong – Xiaomi EX3 SO WHITE Sonic Toothbrush Blue With Three Heads ($-3)
4. Europe – Xiaomi EX3 SO WHITE Sonic Toothbrush [EU] ($-3)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi EX3 SO WHITE Sonic Toothbrush Blue with Pink. The lowest price was: $16.99.
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)).