Just check coupons out (with price alert and history). You probably want to know what is the best price?
Transmit Range: 10m, Lithium Battery Capacity: 500mAh
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Price history and price alert
Price history is not available for this item (not enough database records)! The lowest price was $69.99 though.
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)).