Jack A5E-B AMH2 - Single Needle, Medium-Weight Lockstitch Machine with Smart Fabric Adaptive System. The Jack A5E-B is a single-needle lockstitch machine with automatic functions, bottom feed, and an energy-efficient direct-drive motor. Its elongated design provides 30.5 cm from needle to body. A stepper motor controls stitch length and bartacking, while the Octopus Dual-Core AI chip adjusts machine settings in real time to fabric thickness. Increased torque ensures smooth penetration through multi-layered materials. Features include a thread trimmer cutting to 3.5 mm, three function buttons near the needle bar (1/2 stitch, add stitch, bartack), and a USB port for external device connectivity.