Im assuming these have an impedance rating, but its not listed or mentioned; whats the impedence rating, in ohms?

According to what I've found elsewhere, 8 ohms of impedance, 5 watts RMS, 10 watts peak.

Will they work pressed up against a surface for temporary location or does it have to be stuck on with the adhesive?

Pressing them against the surface will prevent the transducer from vibrating. They work just like a speaker, minus the cone. They can be relocated. New 3m double sided works or hot glue's great too.

Mine has stopped working. Do these run out of battery over a period of time? Or just faulty?

It might be faulty. There's no battery in these; they need to be hooked up to an amp of some kind. The adhesive might have weakened or the speaker driver could have a short or be defective.

ASIN	B001EYEM8C
Audio Driver Size	93.1 Millimeters
Audio Driver Type	Dynamic Driver
Best Sellers Rank	#10,900 in Musical Instruments ( See Top 100 in Musical Instruments ) #8 in Exciters & Enhancers Effects Processors
Color	Black
Compatible Devices	Smartphone, Tablet, Laptop, Television, Home Theater
Control Method	App
Customer Package Type	FFP
Customer Reviews	4.4 4.4 out of 5 stars (742)
Date First Available	August 31, 2009
Department	All Ages
EU Spare Part Availability Duration	5 Years
Global Trade Identification Number	00844632070709
Impedance	8 Ohms
Included Components	2 speakers
Is Discontinued By Manufacturer	No
Is Waterproof	FALSE
Item Weight	5.6 ounces
Item model number	DAEX25
Manufacturer	Dayton Audio
Material	Not Available
Model Name	DAEX25
Mounting Type	Portable
Number Of Circuits	1
Power Source	Corded Electric
Product Dimensions	0.75"D x 3.59"W x 3.59"H
Recommended Uses For Product	For Smartphones or Tablets, For Music Players, For Computers, For Televisions, For Surround Sound Systems, For Gaming Consoles, For DVD Players, For Creative Use with Solid Surfaces
Set Name	2 Pack
Shape	rectangular
Signal-to-Noise Ratio	60 dB
Speaker Size	93.1 Millimeters
Speaker Type	Sound Exciter
Special Feature	Transforms Solid Surfaces into Speakers
Specific Uses For Product	Transforming solid objects into speakers
Style	futuristic
Subwoofer Connectivity Technology	Wired
Surround Sound Channel Configuration	Not Available
UPC	844632070709
Unit Count	1.0 Count
Warranty Type	Full
Water Resistance Level	Not Water Resistant
Wireless Communication Technology	Bluetooth, Wi-Fi
Woofer Diameter	9.31 Centimeters

DAEX25 Sound Exciter Pair

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