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Ei48 10w 220v-9v Transformers Input 220v 50hz Output Single 9v 10va Power Transformer - Transformers - AliExpress
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Doorbell Transformer 3TRAN Tri-Volt (8V 10VA, 16V 10VA or 24V 20VA) Hardwired Door Chime Transformer 8-24V - - Amazon.com
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Amazon.com: weideer Input 110V 50/60HZ Output 24V 10VA Power Transformer AC/AC Single Phase Transformer for Lighting Power Supplies, Audio Equipment etc. Various Small Power Supplies K-030 : Electronics
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Amazon.com: Single Power Transformer AC 12V/24V Output Voltage 5W Input 220V 50Hz Vertical Mount Single-p EI Power Transformer(24V) : Electronics
Doorbell Transformer 3TRAN Tri-Volt (8V 10VA, 16V 10VA or 24V 20VA) Hardwired Door Chime Transformer 8-24V - - Amazon.com
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Amazon.com: Single Power Transformer AC 12V/24V Output Voltage 5W Input 220V 50Hz Vertical Mount Single-p EI Power Transformer(24V) : Electronics
Doorbell Transformer 3TRAN Tri-Volt (8V 10VA, 16V 10VA or 24V 20VA) Hardwired Door Chime Transformer 8-24V - - Amazon.com
HQRP Tri-Volt (8V 20VA, 16V 30VA or 24V 30VA) Transformer Compatible with Ring, Nest and Standard Doorbells Door Chime Power Supply Adapter Door-Bell 120v-to-8v-16v-24v Replacement, UL Listed - - Amazon.com
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Amazon.com: Single Power Transformer AC 12V/24V Output Voltage 5W Input 220V 50Hz Vertical Mount Single-p EI Power Transformer(24V) : Electronics
Doorbell Transformer 3TRAN Tri-Volt (8V 10VA, 16V 10VA or 24V 20VA) Hardwired Door Chime Transformer 8-24V - - Amazon.com