1. Single-slot design, intelligent fast charging, self-stop when fully charged, durable 2. With charging indicator, the red light is on when charging, and the green light is on when fully charged 3. The contact piece is anti-corrosion and anti-oxidation 4. Fireproof shell, fast heat dissipation, high temperature resistance, strong impact resistance 5. Input: 110-240V 6. Output: 3.7V 1A 7. Rated power: 2-5W 8. Weight: about 42.8g 9. Size: about 10 x 3.2 x 3.9cm 10. Description: only the charger, excluding other supplies such as batteries in the picture