RF output power: , 50Hz/150Hz/250Hz/500Hz (2.4GHz), XT30 port: 5V~12V / recommend 2S(8.4V) battery / DO NOT support 3S(12.6V) or above, Input voltage: 5V~12V, 100mW/250mW/500mW (915MHz/868MHz), Weight: 125g, 25Hz/50Hz/100Hz/200Hz (915MHz/868MHz), Frequency bands (Micro RF Module 915MHz/868MHz version): 915MHz FCC/868MHz EU, USB port: Type-C, Brand Name: BETAFPV, Item Name: ELRS Micro TX Module, 25mW/50mW/100mW/250mW/500mW (2.4GHz), Frequency bands (Micro RF Module 2.4G version): 2.4GHz ISM, Version: 2.4GHz/868MHz/915MHz (500mW)/2.4GHz (1W), Packet refresh rate: .
Check coupons or create price alert down below. You probably want to know what is the 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 Europe 
. Uhm… There’s no price history (in my database) for this product right now. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
1. ($41.39): BGRADIORU
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGRCParts8, Tabby20, BG1efeb0, 8Couponsde, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BG8RCToy, hoNEYbGdeAlS, BGToys1, BGRCT10, BGJUNEGSG9, DealBGimpact
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – BETAFPV ExpressLRS ELRS OLED RC Micro TX Module ($-3)
Price history and price alert
It doesn’t make sense to generate price history chart, because there is one price record which is: $39.99.
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)).