I accidentally supplied 5v to the board. would that burn it? it's still responding to at commands.

Hi : The highest operating voltage can only accept 3.6V, We recommend to use regulator for power supply and level shifter for signal. thank you very much.

Is a license or permit needed for operating this device in the Untied States?

The frequency used by RYLR998 does not need to be authorized in the United States. RYLR998 has the US FCC certification, the number is QLYRYLR998, you can use RYLR998 in the US with peace of mind.

Does this support 4g wireless?

Hi Andrew : The RYLR998 is sub-1GHz module, If you want to 4G wireless , please refer to the RYR2040 https://www.amazon.com/dp/B0BL3HR9L1?ref=myi_title_dp or visit our website www.reyax.com

ASIN	B099RM1XMG
Brand	REYAX
Built-In Media	Shielding case
Color	Blue
Colour	Blue
Compatible Devices	Personal Computer, Router, Laptop, Smartphone, Tablet, Printer, Gaming Console
Compatible devices	Personal Computer, Router, Laptop, Smartphone, Tablet, Printer, Gaming Console
Connectivity Technology	LoRaWAN
Connectivity technology	LoRaWAN
Customer Reviews	4.6 out of 5 stars 209 Reviews
Data Transfer Rate	0.38 Megabits Per Second
Item Type Name	lora module
Item Weight	3 Grams
Manufacturer	REYAX
Maximum Upstream Data Transfer Rate	0.38 Megabits Per Second
Maximum upstream data transfer rate	0.38 Megabits Per Second
Modem Type	Digital
Number of Ports	1
Number of ports	1
UPC	612789267033

RYLR998 UART Interface 868/915 MHz Lora Module with Antenna FCC CE NCC Certification

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