<span style="display: inline-block; border-radius: 50%; text-align: center; font-size: 30px; vertical-align: middle;">①</span> - 10 relay channels with LED lights connected to them, indicating their current status; | <span style="display: inline-block; border-radius: 50%; text-align: center; font-size: 30px; vertical-align: middle;">①</span> - 10 relay channels with LED lights connected to them, indicating their current status; |