Amazon.com: Mikrotik SXT 6 equipped with RouterOS Level 4 license and 28 degree Dual Chain 16dBi antenna. Can be used as Base Station or CPE : Electronics
Manual:License - MikroTik Wiki
Manual:Entering a RouterOS License key - MikroTik Wiki
Manual:License - MikroTik Wiki
MIKROTIK RouterBOARD (RB2011iL-RM) (RouterOS Level 4) - The source for WiFi products at best prices in Europe - wifi-stock.com
Manual:Purchasing a License for RouterOS - MikroTik Wiki
MikroTik RouterOS Level 4 / CHR P1 | Getic
Mikrotik RouterBoard RB/1000 RB1000 complete Extreme Performance Router with 4-10/100/1000 ethernet ports and RouterOS Level 6 :: EOL (End of Life - Sold Out) :: ICD Group, Inc
Amazon.com: Mikrotik SXT 6 2-Units Licensed 5.9-6.4GHz Frequency Equipped with RouterOS Level 4 License and 28 Degree Dual Chain 16dBi Antenna. Can be Used as Base Station or CPE : Electronics
MIKROTIK RouterBOARD (RBcAP2nD) (License Level 4) - The source for WiFi products at best prices in Europe - wifi-stock.com
MIKROTIK RouterBOARD (RB3011UiAS-RM) (RouterOS Level 5) - The source for WiFi products at best prices in Europe - wifi-stock.com
MikroTik RouterOS Level 4 / CHR P1 | Getic
How to check MikroTik RouterOS license level - TechOverflow