Charging Connector: USB 3.0 Type-C, Power: ≤100mw, Channel: 8, LED Light: Green-Power On / Red-Warning if the voltage is lower than 3.5V / Blue-Normal, 2.4G System: NRF24L01 / CC2500 / SX1280, Frequency Range: 2.4G (2403MHz-2447MHz), Battery: Built-in 1000mAh 1S Battery, Support USB Charging / Firmware Update, Support Protocol: ExpressLRS 2.4G, Support BETAFPV Simulator Connected / Customized LiteRadio System / Joystick Calibration, Item: LiteRadio 2 SE, Brand: BETAFPV, Adapted Drone Type: Multirotor, Color: White.
Basically copy coupon, view price history or create e-mail price alert. 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 Hong Kong. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
1. ($56.69): BGRADIORU
coupon code has to be applied in shop’s 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): BG5c73d2, BG70e5fc, BGaa6138, Parts8, BGGAL8, BGRCParts8, Tabby20, BG1efeb0, 8Couponsde, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BG8RCToy, hoNEYbGdeAlS, BGJUNEGSG9, BGRCT10
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Here is price history (for all/most countries) for BETAFPV LiteRadio 2 SE RC Transmitter. The lowest price was: $56.69.
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)).