It should have been included in your order.
Generally a good tool to have when you start playing in the RFID field [pun]
As I mentioned, this most likely means it is LF, but not necessarily.
That’s just another good justification for a PM3.
So you have made a working copy? If so, this confirms your card/fob to be LF.
Likely
EM41xx/EM4200, HID ProxCard II or AWID
Are there any markings on the card/fob Or reader(s)?
Hmmm, reccomended might be a stretch, it is definitely a useable tool, with pros and cons. It does what it does easily, it’s small, light and cheap, but is limited in its compatibility.
One big drawback with the blue cloner is, It writes a password to the chip, luckily the password is known, and it can be removed…with a PM3
All blue cloners are LF but not all LF is compatible with the blue cloner.
if you decide to use it on your NExT, if you haven’t already…
if you want to write something outside of EM41xx/EM4200, HID ProxCard II or AWID, you will need to remove the password. (With a ProxMark3)
https://forum.dangerousthings.com/t/handy-dandy-tips-and-tricks/13041/11?u=pilgrimsmaster
So, either, it’s not one of the “big three” (EM41xx/EM4200, HID ProxCard II or AWID
Or, more likely, they will be HF, and the hotels are quite likely Mifare Classic (xM1, FlexM1 etc) or Ultralight…
IF you need / want an xM1, you probably want to get one sooner than later, because I don’t know how much stock is remaining, they were in stock for ages, then out of stock for a good while, they may sell out at any time…
I am reluctant to suggest you getting yourself one BEFORE we know what you need for 2 reasons.