Can this be used without physical switches and only for control with via z-wave?

Yes, the device doesn't need a physical input (switch) and you can control is using Z-Wave commands only. Remember to check your local safety regulations to make sure an emergency physical wall control isn't required for the load you'd like to control with the Zooz device.

I need similar that can run from 12-18vdc power, so I can relay some aux devices that also run on 12-18vdc. Do they make it?

I haven't found 1 for 18vdc So I used it to turn a 110v ac in 18vdc out powersupply on and off I know it's involved but it what I did

Will these work on GFCI circuits? I have 2 outdoor lights that are on ground fault circuits and all of the zwave switches I have tried trip the gfci.

Yes, it can be installed on a circuit with a GFCI. I have this installed on an exterior circuit with GFCI and it works just fine.

Does it click when on/off? If yes, how loud?

Any relay will make a sound when clicked so you will hear it when it's switched on and off. It's not too loud, just like your average 15A relay.

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Zooz 700 Series Z-Wave Long Range Smart Relay ZEN51 | Installs Behind Wall Switch Or At the Light | Compatible with SmartThings, Hubitat, and Home Assistant | Z-Wave Hub Required (Sold Separately)

Zooz 700 Series Z-Wave Long Range Smart Relay ZEN51 | Installs Behind Wall Switch Or At the Light | Compatible with SmartThings, Hubitat, and Home Assistant | Z-Wave Hub Required (Sold Separately)

Product ID: 457380530

Details

Connector Type
Screw
Contact Material
Copper
Contact Type
Normally Open
Current Rating
1.5 A
Mounting Type
Flush Mount

⚡10A max current rating

📶Z-Wave Long Range tech

🛠️Compact 1.5"x1.4"x0.7" size

€ 79.81

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Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔌 Power your smart home with invisible control and long-range reach!

SMART BULB MODE - Keep your smart bulbs powered and controllable without cutting their power.
3 WAY SETUP READY - Automate complex lighting setups even without neutral wires at the switch box.
COMPACT CROWD FRIENDLY - Slim design fits effortlessly in tight switch boxes for hassle-free installation.
SEAMLESS SMART INTEGRATION - Add Z-Wave control behind your existing switches without changing their look or feel.
ROBUST COMPATIBILITY SUPPORT - Works flawlessly with SmartThings, Hubitat, Home Assistant, plus backed by US-based support and a 5-year warranty.

The Zooz 700 Series ZEN51 Smart Relay is a compact, ETL-certified Z-Wave device designed to retrofit behind existing wall switches or at light fixtures. It supports 10 amps at 120 volts, enabling smart on/off control without replacing your switch style. Compatible with major hubs like SmartThings, Hubitat, and Home Assistant, it features advanced 700 Series Z-Wave Long Range technology, 3-way automation, and a unique smart bulb mode to maintain power to smart bulbs. Installation is simplified with pigtail wires and a small form factor, making it ideal for modern smart homes seeking seamless automation with professional-grade reliability.

Specifications

ASIN	B0B5VR87JX
Best Sellers Rank	#65,439 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #439 in Electrical Light Switches
Brand	ZOOZ
Brand Name	ZOOZ
Coil Voltage	120 Volts
Connector Type	Screw
Contact Current Rating	10 Amps
Contact Material	Copper
Contact Type	Normally Open
Current Rating	1.5 Amps
Customer Reviews	4.2 out of 5 stars 135 Reviews
Included Components	Smart Relay, User Manual
Lower Temperature Rating	32 Degrees Fahrenheit
Manufacturer	Zooz
Maximum Switching Current	10 Amps
Maximum Switching Voltage	120 Volts
Model	ZEN51
Mounting Type	Flush Mount
Operation Mode	Automatic
Part Number	ZEN51
Smart Home Compatibility	Smart Home Compatible
Specification Met	FCC
UPC	853478006513
Wattage	960 watts

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€ 79.81

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Greece.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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