The CanaKit 3.5A USB-C power supply (UL Listed) is specially designed and tested for the Raspberry Pi 4. This CanaKit power supply incorporates a noise filter to provide the highest power stability. It incorporates a thick 18 AWG and well insulated cable with a 5-foot cable length. The included CanaKit PiSwitch provides a premium quality and reliable power switch to the Raspberry Pi 4! It is made of high quality elements to minimize electrical resistance. A low quality switch can result in high electrical resistance and reduced voltage, and so the switch conductivity and material is essential when used with the Raspberry Pi4. CanaKit PiSwitch Features: - Built-in LED indicator - High quality components resulting in minimal electrical resistance - Sleek high-gloss finish Important Note Compatible with Raspberry Pi 4 only. Not compatible with Raspberry Pi 3 B, B+, A+ or Pi Zero.