HOLTEK RF IC បូក PIR មគ្គុទ្ទេសក៍អ្នកប្រើសិក្ខាសាលាទ្វារឥតខ្សែ
HOLTEK RF IC Plus PIR Wireless Doorbell Workshop Specifications Revision: V1.20 Date: November 13, 2024 RF Frequency: 315/433 MHz Power Input: DC 5V (Transmitter), AC Power 85~265V (Receiver) FAQ Q: Can I use my own custom ringtone with the Wireless…