ESC signal M1 - M4 wires or solder pads on the bottom side

【4-Port 2S Balanced Charger with Storage Mode】 You can balance the charging of four 2S batteries at the same time

delivering an exceptional flight experience with its cutting-edge ELRS (ExpressLRS) transmission protocol

make sure the RF TX module has the same binding phrase to perform an automatic binding

SpeedyBee F405 Mini BLS 35A 20x20 stack fpv ESC signal M1 - M4SpeedyBee F405 Mini Stack BLS 35A 20x20 WIRING DIAGRAM AND MANUAL Utilizing an upgraded F405 flight controller chip with better performance than the F411, it features a built in Bluetooth chip for seamless wireless Betaflight tuning. The board features a 4 level battery voltage display, built in barometer, and supports connectivity to all DJI air units. It offers 4 available UART ports and a dual BEC configuration with 5V 2A and 9V 3A outputs. 4 in 1