Specification: Product name: USB C to Mag-Safe Adapter Brand: Answin Color: White Working Temperature: -40°F~+180°F Compatibility: Input with MacBook (Pro) 45W 60W and 85W Mag-Safe 1 or Mag-Safe 2 Power Adapter. Output for MacBook Pro 2016/2017/2018 and other usb-c-equipped laptops, mobile phones. Games Consoles: For Nintendo Switch Feature: Double sides of adapter can work: Double sides of adapter can be plugged into your devices, so you don’t have to spend time on distinguishing which side you should plug in. How to connect: 1. Connect the power brick to AC source, and then connect USB C charger connector to this USB C port. 2.Connect this Mag-Safe connector to your MacBook. Here, the signal light won’t turn on, but it will not affect the charging effort. 3. The signal will be connected about 20 seconds. Important Note: The maximum output is 45W when you connected the Mag-Safe 1&2 adapter if you use MacBook old 45W and 60W adapter to charge, and for the 85W adapter, the output power is 60W. When you using our USB C-PD to Mag-safe1 Mag-safe2 adapter to charge MacBook 15’’ in the output power of 45W, computer may become little bit heat and slower charging than your original USB-C adapter. However, slower charging is better for the protection of the battery.