Materials: ABS, Power: 3W, Input Voltage (V): 1.5V.
Basically copy coupon, view price history or create e-mail price alert. What is the best price?
Aliexpress
I could not find it on Aliexpress. 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.
Link: Banggood product page
1. ($12.60): Cuponation9
2. ($12.74): TTSUMMER8
apply it 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): 502C6B, vipupgrade8, ML15%Pro, BGKM666, BGSR15, bgshOOp10, bGhOnEy10, BGHB20, BgoFErTaSchInA10, BgcLuBofErtA10, BGCLUBOFERTA10, BGAFF10OFF, 13f142, BGCuponation10, BGHONEY2110, BG10OFFAFF, BGwhielabel, BG10OFFAFF1, BANGGOODSD, 6GSGIT, BGHealth06, 2022ACTIESNL, BGHB218, 2203ActiesNL, BGHECARE1, BG4ee866
(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 Kemei KM-666 Mini Electric Trimmer? There we go. The lowest price was: $3.82.
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)).