Slovakia → Hong Kong
Slovakia plugs
Type C
Type EHong Kong plugs
Type GNo shared plug types. A travel adapter is required.
Compatibility: Adapter Required
Voltage — Slovakia 230V — Hong Kong 220V
Voltage difference is small. Most electronics will work safely.
Device compatibility (phones)
Phones almost always support 100–240V, so yours should work safely. Check your charger label to confirm.
You likely only need a plug adapter (if socket shapes differ). Voltage is close between these countries.