Welcome to our shop! Here are the details of the DC-DC step-down conversion module: - Input voltage range: 3.3-5.5V - Output voltage: 3.3V with an accuracy of ±2.0% - Maximum long-term output current: 1.8A - Short-time maximum output current: 2.2A - Conversion efficiency: Up to 97% (at 4.2V to 3.3V / 500mA) - Low quiescent operating current: 20uA - Features over-temperature protection, input under-voltage protection, soft start, and output short circuit protection - Small size (approx. 15 x 11 x 5.7mm / 0.6 x 0.4 x 0.2in without pin) and high power - Stable performance with high-quality electronic components and accurate manufacturing process Please note that this listing is for 2 x Step Down Module. 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactory after-sales service.