Has good electrical conductivity and is designed for long-term use with durability. Suitable for various applications including digital devices, remote controls, toys, communication equipment, household appliances, computer products, security monitors, audio-visual, and other electronic devices. The socket is environmentally friendly and flame retardant. Product material: Nickel-plated outer layer resists oxidation. Application range: Commonly used in car audio systems, video communications, cassette players, stereo systems, and telephones. Color: Black Material: Plastic Package Contents: 1 x DC 2.1 charging port set Note: The package includes only the items listed above; other accessories are not included. Note: Slight color variations may occur due to lighting and screen display differences. Measurement error allowance is +/- 1-3 cm.