Playback time 15-20 hrs, Li-ion battery 3.7V/500mA, bluetooth name BT12, Packaging dimension 24*14*3.5cm, Interval between left and right horn 44cm, Diameter of the horn 4.1cm, Charging Voltage 5V, Color Black, bluetooth version 4.1+EDR, Transmission Range 20-30meters(depending on devices), Standby time ≤240hrs, Frequency 2.402GHz-2.480GHz, Distortion <1%, Transmission Distance of Microphone ≤1meter, Charging time ≤2hrs, Materials Plastic, USB cable length Approx 1m, Horn wire length 17cm. You can create price alert here, copy coupons and view price history. What is 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 and price update (UTC):
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
1. ($23.27): BGSCM11
coupon code has to be applied in shop’s 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): BG2b291d, BGwhielabel, 13f142, BG10OFFAFF1, BANGGOODSD, BGMOTO478, BG00c906, ADMITAD2212, 2022ACTIESNL, Terence, Tabby20, 2203ActiesNL, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, BGAUTO22, BGdcbfa8, BG8ReviTrage, Cuponation9, BGSCM75, BG9c587d
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for BT-12 Motorcycle Helmet Headset. The lowest price was: $17.99.
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)).