You can get SONOFF RF BridgeR2 Smart Wi-Fi Hub 433MHz RF for $14.99 with coupon (from Banggood). Get coupons, create price alert or check price history out! You probably want to know what is the best price?
Working temperature: -10°C~40°C, Product Dimensions: 62x 62x 20 (mm), Material: PC V0, Certificate: CE / FCC / Declaration of EU RoHS Conformity, Power Supply: USB 5V, Security Mechanism: WPA-PSK/WPA2-PSK, Wireless Standard: WiFi 802.11b/g/n / 433.92MHz
Latest coupon and price update (UTC):
Banggood ($14.99)
Banggood warehouse is located in China. Hmmm… There is no active coupon in Banggood at this moment. You probably want to know if this is a good price. Looks like a good price to me (average is $16.99).
Link: Banggood product page
Price: $14.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG364550, ADMITAD2212, BGSmart6, BG1382fb, MVC8SPRING, 8BGwbg2204, 2203ActiesNL, tRaDetRaCKeR, BGJUNEGSG9, BG15Sonoff, BG8ReviTrage, Cuponation9, 9OFFSUMMER
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for SONOFF RF BridgeR2 Smart Wi-Fi Hub 433MHz RF is here.
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)).