Go down and check coupons out. Remember to check price history if it is available. Best price?
bluetooth ble 4.1 + bt 4.2, Vents 13, Standby duration Max 180 days, Electrical parameter DC 5V / 0.5A, Speaker 2x 0.5W, Shell size 55-59cm, Charging time Approx 3 hrs, Battery capacity 3.7V 450mAh, LED light bead 6, Material EPS + PC, Charging port Magnetic USB, Battery endurance Approx.10hrs for lighting / 3-6hrs for music and lighting
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
smart4u cycling helmet with tail light led road electric bike helmet for men/women city urban bicycle helmet brake light IPX4 | $60.27 | – |
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. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): 690ab0, TTxBG10, BGdyp1, 626b9c, aa9aba, AFfbG10, BGBFAFF2019, BGCITYADS2019, BGMPB2020, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BgoFErTaSchInA10, BgcLuBofErtA10, BGAHZ, BGDEALKAI002, BGMUBB, BG10OFFAFF, BGwhielabel, BG53e268, 7bcdf9, BG10OFFAFF1, BG4d9120, 00c906, BG00c906, ADMITAD2212, 2022ACTIESNL, 2203ActiesNL, BG1efeb0, MVC8SPRING, 8BGwbg2204
(probably won’t work, but you can try them out)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Xiaomi Smart4u SH55M Helmet [EU] ($-3)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi Smart4u SH55M Helmet.
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)).