The Blueson A1 is designed with a high-quality ultra-high copper thickness PCB that not only ensures robust current carrying capacity but also enhances heat dissipation. It features top-level MOSFETs to boost flight performance, allowing for exhilarating aerial experiences. The unit is powered by a high-speed 32-bit processor, supporting a dynamic PWM refresh rate ranging from 8KHz to 128KHz for precise speed response and smoother throttle control. It supports a wide voltage input of 6S/8S, making it versatile across different power batteries. The 20 x 20mm installation hole spacing is specifically tailored for racing drones, ensuring easy installation. Additionally, the ESC includes a large solder pad area to simplify the soldering process. Model: Blueson A1 Processor: AT32F421 Firmware Version: AM32 or BLHeli_32 PWM Frequency: 8KHz-128KHz Working Voltage: 2-6S / 2-8S Lipo / LiHV Continuous Current: 6S 65A / 8S 70A Current: 6S 120A / 8S 150A Supported Protocols: Dshot600/300/150, Oneshot, Multishot, PWM Mounting Hole Spacing: 20 x 20mm, 4mm/M3 Dimensions: 42.5 x 36 x 7mm (L * W * H) Specifications: A: 8S 70A BLHeli_32 Color: As Shown Material: PCB Package Contents: 1 * Electronic Speed Controller KIT 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.