# I/O Connection
## GIMBAL CONNECTION
### **HDMI:**
To output video from the camera.
**Connector type:** micro HDMI.
### **CTRL:**
CTRL is a serial protocol (UART) port which is used to interface with Sony A7R IV via USB C port.
**Connector type:** JST SM10B-GHS-TB(LF) (SN).
### **USB-C:**
To interface with computer or upgrade firmware.
**Connector type:** USC type C.
### **Device Switch**:
To switch between the gimbal and SOM for firmware upgrading.
**Connector type:** 2 level switch.
### **Micro SD card:**
To insert the micro SD card for Geo data storage.
**Connector type:** Micro SD card.
{% hint style="info" %}
Note: Recommend SD Card from 30GB, at least 50MB/s read/write speed
{% endhint %}
## GIMBAL BUTTONS
### **Boot:**
To push the firmware during upgrading process.
### **Reset:**
To reset the system in case needed.
## QUICK RELEASE CONNECTION
### CONNECT
**STEP 1:** The marks on the top part and bottom part must be aligned.
**STEP 2:** Keep everything aligned and attach the bottom part to the top part.
**STEP 3:** Rotate the bottom counter-clockwise until the mark on the ring aligned with the locked icon.
### DISCONNECTION
**STEP 1:** Press & hold the release button.
**STEP 2:** Rotate the bottom clockwise.
**STEP 3:** When the mark on the top aligned with the unlock icon on the bottom, the PIXY SM can be detached from the top part of the Quick Release.
