Timer Telephone Busy Tone DIY Project Kit

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Timer Telephone Busy Tone DIY Project Kit
Price:
Sales price: $14.15
Manufacturer: ThailandKit
Description

This circuit is project kit to make telephone line busy when you don't want to hear the ring and don't want any disturbances from in coming call. It will release to normal operation after reach timer setting.

Technical information:
 - No Power Supply needed
 - PCB size 6 cm x  10 cm.
 -Timer selection 7.5 minutes / 30 minutes / 60 minutes / 120 minutes.