Rated voltage 3.7V, Charging method USB charging, Rated power 2.5W, Charging current 330mA, Model MY- -300, Charging voltage 5V, Battery capacity 400mAh / continuous working time of about 1 hour.
Price history, coupons and price alert are available on this page. 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 price update (UTC time):
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
1. ($32.66): BG10OFFAFF1
apply it 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): BGEyeC2, vipupgrade8, bgws22, BG11BB, BG111BB, BGHB20, BgoFErTaSchInA10, bGhOnEy10, BGSD56235, BgcLuBofErtA10, 13f142, BGCuponation10, BGHONEY2110, BG10OFFAFF, BGwhielabel
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for WellSkins Eyes Massager Wand? There we go. The lowest price was: $15.99.
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)).