S021KM2400088 has two versions of the power supply, what we sell is the newer version (larger Pin-Outs 3.0mm),the older version is smaller Pin-Outs 2.1mm.
There are multiple versions of the Hue Lightstrip,Buyers can refer to Figure 2 to determine the version of the light strip, and then select the correct power supply.
Type: AC/DC LED Power Supply
Model:S021KM2400088 (Replace S020YM2400083/S020XM2400083)
Input: 100-240V 50/60 Hz 0.6A
Output: 24V-0.875A 21W
Compatible With:
Hue Lightstrip Plus V4 (2020 Version Model:9290022691)
Hue Lightstrip Plus V3 (2017 Version Model:71901A)
Attention: It does not support Hue Lightstrip Plus V2 ( 2015 Version Model: 7190355PH ),unless you use an adapter.
Package Include:
1 x Power Supply AC Adapter 24V 0.875A for Hue Lightstrip Plus V3 V4 (Bulk Pack )