Go down and check coupons out. Remember to check price history if it is available. You probably want to know what is the best price?
Case: not include, Operating current: <=100mA, Weight: 23g, MCU: STM32F103CBT6 (128K ROM, Operating voltage: 5-14V, Operating frequency: 2.4G ISM band, be on sell later, RF power: +22dBm, 20K RAM), Version: Flysky, Size: 55x41x7mm, JR (optional), button not include, Frsky
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
STM32WB5MM-DK Discovery kit with STM32WB5MMG MCU module STM32 Multi-protocol wireless Ultra Low Power Radio Bluetooth BLE | $118.10 | – |
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.
Link: Banggood product page
1. ($51.97): BGRADIORU
2. ($53.12): BGRCParts8
3. ($53.12): hoNEYbGdeAlS
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/5cd
Old coupons (from the oldest to the newest): 502C6B, Parts8, BG9NY, 2020CNY, BGTT10, bGhOnEy10, BGSS10%SW, bgshOOp10, BGRC902, BGRCRR9, BGCuponation10, BGDAVIS, BGradio9, BG70e5fc, BGGAL8, BG1efeb0, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BG8RCToy, BGRCT10, BGJUNEGSG9
(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 Multi-protocol STM32 RC TX Module With Antenna? There we go.
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)).