Feature: . 1. This product uses IC (MCU) intelligent control pulse charging technology to charge the battery alternately and cyclically, providing faster charging compared to traditional USB cables. 2. Monitors battery voltage during charging to effectively improve battery life and achieve balanced charging performance. 3. Built-in protection functions include input overvoltage protection, output short circuit protection, and reverse battery connection protection. Automatically stops when fully charged to ensure safety. 4. Two-color LED indicator: Red light stays on when powered; green light flashes during charging and stays on when charging is complete. Red light will flash if a battery fault is detected. Specifications: Input: DC 5V 2A Output: 7.4V / 2000mA / 1000mA / 500mA (Selectable) Color: Black Compatible with: Remote control aircraft, remote control cars, remote control ships Caution: Keep away from fire. Note: 1cm = 10mm = 0.39inch. No retail packaging included. Slight measurement variations of 1-3mm may occur due to manual measurement. Please confirm you accept this before purchasing. The actual color may vary slightly due to differences in monitor displays. Package Included: 1 x Charger