This is merely one of many layers of security. Understand that plastic bags can be “hacked” with sharp knives, a heat press and so on. This is an example of “Defense in Depth”.<\/p>\n
Mk4 (Bag V3)<\/h3>\n
A serialized tear off tab of the bag is included inside. You should use this tab to double check the width of the bag. You can also use a magnifying glass to check the perforations of the tab match the bag. It is important to observe that the bottom of the bag is seamless.<\/p>\n
![\"\"](\"https:\/\/bitcoinvn.io\/shop\/wp-content\/uploads\/2024\/04\/coldcard-genuine-check-3-1-1024x502.jpg\")
<\/p>\n
MK3 (Bag V2)<\/h3>\n
We are still distributing MK3’s with this bag design.<\/p>\n
![\"\"](\"https:\/\/bitcoinvn.io\/shop\/wp-content\/uploads\/2024\/04\/coldcard-genuine-check-2-1.jpg\")
<\/p>\n
Power Up!<\/h2>\n
Use a USB cable to connect a power supply to the USB port on top of the Coldcard. Mk4s use USB-C, MK3’s use Micro-USB. Any standard cable you already have can be used. You can connect to a computer for power if you plan to use it USB-tethered, or use a phone charger\/power pack to maintain air-gap.<\/p>\n
The First Thing You See<\/h2>\n
When you power on for the first time, the first thing to appear should be the Terms of Sale screen:<\/p>\n
![\"\"](\"https:\/\/bitcoinvn.io\/shop\/wp-content\/uploads\/2024\/04\/coldcard-genuine-check-4-1.jpg\")
<\/p>\n
If you look closely at the right edge of the screen, there is a small scroll bar and arrow pointing downwards. Use the 5 and 8 keys to move up and down to see the full message.<\/p>\n
The complete terms document\u00a0can be found here.<\/a>\u00a0Press the OK key (checkmark, lower right) to accept the terms and continue.<\/p>\n Once you are satisfied that your device is genuine, strongly consider upgrading to the latest firmware using this guide.<\/a><\/p>\n