Secrui Wireless Doorbell M523 User Manual Package: 1X Secrui wireless doorbell receiver 1X Secrul transmitter button 1X Double-side adhesive table 1X Secrui User manual Product features: 4 levels of adjustable volume. 32 ringtones options Memory function Fixed tone buttons settable Each doorbell receiver works with up to 20 transmitter buttons at most. Product Specification: Doorbell …
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