Each string is 5 meters (16 ft) 10 LEDs/meter (50 LEDs per string)
These are really fun little LED strings! I use them on our Christmas tree. They are ws2812b (5v) so they are controllable with WLED and any compatible controller (DigUno, DigQuad, PixelPro, NodeMCU etc). They’re smaller than regular ws2812 leds, so they use less power. They are IP65, but I can’t guarantee they’ll be okay outside.
IP65 = Water resistant. Do NOT submerge IP65 LED lights, these are not waterproof.
They are available from AliExpress for less $: https://s.click.aliexpress.com/e/_A7QngV
I showed these briefly in this video: https://youtu.be/3h8bw-vmosY?t=1342