Product comparison · 2 panic buttons

Dahua Technology DHI-ARD812 panic button Wired Universal vs Dahua Technology DHI-ARD821-W2 panic button Wireless Alarm

12specifications compared
10differ
2identical
9known for one product only

Key differences

The Dahua Technology DHI-ARD812 panic button Wired Universal has 272 mA more alarm current than the Dahua Technology DHI-ARD821-W2 panic button Wireless Alarm (300 mA vs 28 mA). The Dahua Technology DHI-ARD812 panic button Wired Universal has 13.5 mm more width than the Dahua Technology DHI-ARD821-W2 panic button Wireless Alarm (49.5 mm vs 36 mm). The Dahua Technology DHI-ARD821-W2 panic button Wireless Alarm has 22.5 mm more depth than the Dahua Technology DHI-ARD812 panic button Wired Universal (55 mm vs 32.5 mm). Connectivity technology: Wired on the Dahua Technology DHI-ARD812 panic button Wired Universal, Wireless on the Dahua Technology DHI-ARD821-W2 panic button Wireless Alarm. Purpose: Universal on the Dahua Technology DHI-ARD812 panic button Wired Universal, Alarm on the Dahua Technology DHI-ARD821-W2 panic button Wireless Alarm.

Connectivity technology
- DHI-ARD812 panic button Wired Universal:Wired
- DHI-ARD821-W2 panic button Wireless Alarm:Wireless
Purpose
- DHI-ARD812 panic button Wired Universal:Universal
- DHI-ARD821-W2 panic button Wireless Alarm:Alarm
Product colour
- DHI-ARD812 panic button Wired Universal:Grey, Red
- DHI-ARD821-W2 panic button Wireless Alarm:White
Power source
- DHI-ARD812 panic button Wired Universal:DC
- DHI-ARD821-W2 panic button Wireless Alarm:Battery
Alarm current
- DHI-ARD812 panic button Wired Universal:300 mA
- DHI-ARD821-W2 panic button Wireless Alarm:28 mA
Width
- DHI-ARD812 panic button Wired Universal:49.5 mm
- DHI-ARD821-W2 panic button Wireless Alarm:36 mm
Depth
- DHI-ARD812 panic button Wired Universal:32.5 mm
- DHI-ARD821-W2 panic button Wireless Alarm:55 mm
Height
- DHI-ARD812 panic button Wired Universal:53.5 mm
- DHI-ARD821-W2 panic button Wireless Alarm:14.2 mm

Side by side

Differences highlightedShow differences only

Comparison of DHI-ARD812, DHI-ARD821-W2
21 specifications	A Dahua Technology DHI-ARD812 panic button Wired Universal Model DHI-ARD812 View product	B Dahua Technology DHI-ARD821-W2 panic button Wireless Alarm Model DHI-ARD821-W2 View product
Features4 differ
Connectivity technologyDiffers	Wired	Wireless
PurposeDiffers	Universal	Alarm
Product colourDiffers	Grey, Red	White
Housing materialDiffers	Acrylonitrile butadiene styrene (ABS)	Acrylonitrile butadiene styrene (ABS), Polystyrene (PS)
Transmission distanceKnown for one	Unknown — not stated by the source	1300 m
Operating frequencyKnown for one	Unknown — not stated by the source	433.1/434.6 MHz
BacklightKnown for one	Unknown — not stated by the source	Yes
Certification	CE	CE
Power2 differ
Power sourceDiffers	DC	Battery
Battery typeKnown for one	Unknown — not stated by the source	CR2032
Alarm currentDiffers	300 mA	28 mA
Operational conditionsidentical
Operating temperature (T-T)	-10 - 55 °C	-10 - 55 °C
Operating relative humidity (H-H)Known for one	0 - 95%	Unknown — not stated by the source
Weight & dimensions4 differ
WidthDiffers	49.5 mm	36 mm
DepthDiffers	32.5 mm	55 mm
HeightDiffers	53.5 mm	14.2 mm
WeightDiffers	34 g	18 g
Package widthKnown for one	Unknown — not stated by the source	59.5 mm
Package depthKnown for one	Unknown — not stated by the source	95 mm
Package heightKnown for one	Unknown — not stated by the source	30.5 mm
Package weightKnown for one	Unknown — not stated by the source	48 g

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

More panic button comparisons

All panic button comparisons