For Samsung Galaxy A40 , A405 - Replacement Power & Volume Buttons Internal Flex Cable

Restore tactile command response and hardware triggering with this Precision Internal Button Flex. Specifically engineered for the Samsung A40 (SM-A405), this component features high-sensitivity metal dome switches mounted on a flexible polyimide substrate. The assembly is designed to provide the original actuation force and "click" feedback for the power and volume (+/-) controls, ensuring low-latency signaling to the CPU. The module features high-conductivity gold-plated contact pads for a corrosion-resistant link to the motherboard pins and is designed for exact Z-axis alignment within the A40 internal side-rail housing.