Amazon.com: Newhouse Hardware 3TRAN Tri-Volt (8vac/10VA, 16vac/10VA or 24vac/20VA) Transformer for Ring, Nest and Standard Doorbells 1pk, Assorted : Everything Else
Functional Device TR50VA004 1 Phase Control Transformer 480/277/240/120 Volt AC Primary 24 Volt AC Secondary 50 VA Rib: Amazon.com: Industrial & Scientific
Isolation Transformer, Power, 80 VA, 1 x 115V, 2 x 230V, 2 x 115V, 700 mA, WORLD Series: Electronic Transformers: Amazon.com: Industrial & Scientific
Electronics-Salon 20 Watt(VA) DIN Rail Mount Power Transformer Module (in: 115VAC, Out: 24VAC): Amazon.com: Industrial & Scientific
F4-10 - Isolation Transformer, Quick Pack, 6 VA, 1 x 115V, 10V, 600 mA: Electronic Transformers: Amazon.com: Industrial & Scientific
Isolation Transformer, Quick Pack, 100 VA, 2 x 115V, 120V, 850 mA: Electronic Components: Amazon.com: Industrial & Scientific
Isolation Transformer, 96 VA, 1 x 115V, 12V, 8 A: Electronic Components: Amazon.com: Industrial & Scientific
Hotop 24VAC, 40 VA AC Transformer Plug in with PTC Fuse Compatible with Ring Nest Doorbell UL Listed - - Amazon.com
Isolation Transformer, Low Voltage, 100 VA, 1 x 230V, 2 x 115V, 10V, 10 A: Electronic Transformers: Amazon.com: Industrial & Scientific