①. Efficient Solar Charging: This solar voltage regulator offers fast charging capabilities with a 5V 3A output, ensuring your devices are powered up quickly and efficiently using solar energy ②. Sturdy Material: Constructed from PP, this regulator is designed to withstand various environmental conditions, making it suitable for outdoor use ③. Compact Design: With dimensions of 4cm x 4cm x 1.2cm, this compact device is easy to carry and integrate into your solar setup without taking up much space ④. Double USB Ports: Equipped with 2 USB interfaces, it allows you to charge multiple devices simultaneously, enhancing convenience and functionality ⑤. Stable Voltage Regulation: Ensures consistent power delivery to your devices by maintaining stable voltage levels during the charging process, protecting them from potential damage caused by fluctuations ⑥. Size Chart: 4cmx4cmx1.2cm/1.57inchx1.57inchx0.47inch ⑦. Package Includes: 1 Piece Solar Charge Controller ⑧. Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Hope you a wonderful on-line shopping!