Feature: 1. APPLICABLE MODEL: This step down regulator is compatible with for 4/5 inch 220mm 210mm 250mm 6s FPV X quadcopter, such as for Martian II 220 QAV250 QAV210 X210. 2. WIDE INPUT VOLTAGE RANGE: It applies to a wide range of input voltage from 6V to 30V, suitable for 2s‑6s lithium batteries, meeting the power supply needs of a wide range of aircraft. 3. HIGH EFFICIENCY: This high efficiency synchronous step down regulator can stabilize the output voltage to ensure stable running of the aircraft and provide reliable power support. 4. ADJUSTABLE OUTPUT VOLTAGE: The output is adjustable, and you can choose 5V or 9V output, which can flexibly respond to the power needs of different scenarios. To get 9V, you need to bridge two pads. 5. HIGH LOAD CURRENT: The quadcopter step down regulator has a continuous load current of 1.5 Amps, up to 2.5A 5s/min, which is stable in running. Specification: Item Type: Quadcopter Step Down Regulator Material: PCB Applicable Model: For 4/5inch 220mm 210mm 250mm 6s FPV X Quadcopter, For Martian II 220 QAV250 QAV210 X210. Package List: 3 x Quadcopter Step Down Regulator