Color Black, Usage Pattern Wireless, RGB Light Support, bluetooth Version V5.0, Material Titanium+soft glue material, Wearing Type Over-ear, Transmitting Distance 10m, Brand Lenovo, Model Lecoo-C9.
Basically copy coupon, view price history or create e-mail price alert. 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 code price check (UTC time):
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!
Additional Banggood coupons: first page and second page
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
1. (16.1.2024, $35.99): BGRJANELC9
Item: Lenovo C9 Bluetooth Glasses Headphones
Countries: Greece
Old coupons (from the oldest to the newest): BG20aaff, BGf3b736, BG966fa7, BG6d8262, BG1b5830, BG5b6bb0, BGSaleFeb8, BGAudio3, BGAudio9, BGHEP5
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for Lenovo C9 Bluetooth Glasses Headphones. The lowest price was: $33.59.
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)).