Micro LED string, Battery operated or Eletric.
LED color: warm white/cool white/red/blue/green/yellow/purple/pink/multi. Pupular LED color is warm white
Bulb spacing: from 1.6cm to 30cm. Popular bulb spacing is 5cm and 10cm
String color: silver/copper/green/gold/black/brown. Popular string color is silver
number of LED: from 10 to 2000. Popular number of LED is 20/30/60 lights for battery operated items and 120L/300L/600L for the eletric items.
Package: polybag + color header for the promotion items or PVC box + color sticker for the normal retail items.