The following strips all included a power supply. There's no need to buy extra.

It can be easy plugged and used.
Remote Control Waterproof RGB LED Strip 220V SMD Lamp Outdoor lights

Specification
LED type: 220V SMD 5050 RGB LED strip
Output power: Max 15W / m
Size: W15mm x H 7mm
Emitted Colour: RGB
High brightness
Great for home garden decoration
Protection Rate: Waterproof IP67
Working temperature: -20 ~ 60 degree
Long service life, more than 50,000 hours
Cuttable every 100cm

Applications:
Light up colourful home life, DIY household lights for hallways, stairs, trails, windows

Light up colourful life hotels decoration use, Theaters, clubs, shopping malls, festivals and performances

What's in the box
1x RGB LED strip
1x RGB controller
1x RGB remote (With Introduction)