1. Built-in Barometer 2. 5V 2A&9V 3A dual BECs 3. Sufficient 4 x UARTs available 4. Onboard 8MB storage 5. Support for Air Unit O3/Link/Vista Change motor directions wirelessly Onboard 4-level battery life indicators 470uF Rubycon High-frequency Low- capacitors Wireless FC & ESC full configuration via for app Specifications: For F405 Min Barometer: Built-in BLE Bluetooth: Supported. WiFi: Not supported Power Input: 3-6S Lipo Mounting: 20x20mm 3.5mm hole size, (Compatible with M2 and M3 screws/silicone grommets) Dimension: 32mm(L)x 35mm(W)x 14.2mm(H) Weight: 13.5g Color:As Shown Material:PCB Package Contents: 1 * F405 Mini Stack Flight Controller 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.