1. Users can develop based on AT commands or directly based on AIR780E 2. Onboard AIR780E module, low power consumption, sleep power consumption as low as 600uA 3. Flip-top nano SIM card holder, easy to load and unload 4. Onboard blue AIR780E network status indicator (GPIO27) 5. Support Type-C power supply + 2.54mm pin header 5V power supply (The product appearance and printed words depending on the batch, but this does not affect use) Material: PCB colour: As Shown Package Contents: 1 x Relay Module 1 x 12P Single Pin Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.