1,Pulg-in wire free ,BS/European /USA/Australian pulg available.

2,Iphone surface finishing ,black color available

3.FCC ,CE and ROHS compliant.

4,Transmitter/bell push IP44 waterproof.

5,1million sets of auto-learning codes to avoid interference

6,While bady with silver plated frame

7,Energy saving ,transmitter battery can be used for over 15months ,and the  pulg-in receiver wroking power consumption less than 5W.

8,Music volume adjustable ;flash ,ring ,or flash+ring for function option .

9.Wroking power consumption≤5W ,Tranmit power <100mW,

10.Sound potion :36 polyphone melodies.

Auto-learning Code wireless doorbell QH-823AC