I lost the instructions for this thermometer and when it needed a new battery I had to find out how to set the time and so on.

So, this is what you do:

1. Use uncurled a paper-clip and push it into the reset hole on the front. you can feel the little button pop in when you press to reset it.
2. Press the "Memo" button until you get it into time setting mode. This is just like a lot of cheap clocks where you use one button to change the item (hours, minutes, date and so on)
3. Use the "Memo" button to set each setting and the "Talk" button to move to the next

When you have done it should work right.

More:

Inside the battery compartment is a tiny button below and to the left of the battery, this changes it between Celsius and Fahrenheit.

Holding the "Talk" button in for 3 or 4 seconds toggles the voice on and off. It gives 1 little pip sound for off or 2 for on.

Of course the big button on the back reads your temperature and the memo button shows you the stored readings and the date for each.

I hope this helps ... N.

P.S.
I got the spec' from the web

Product Description

* Measures both ear & forehead temperature
* Instant body temperature measurement in 2 seconds
* Measurement range from 32.0º Cto 42.9º C(89.6 º Fto 109.3º F)
* Washable sensor tip
* 30 sets data storage
* Measure ambient temperature
* Real time clock with calendar display (with auto-sleep function)
* Human voice with good quality speaker
* User option to disable the talking
* Celsius / Fahrenheit convertible
* Battery: 1 x CR2032
* FDA and CE0123 Approved

More Product Features

HS Code:	90189090
Trademark:	OEM
Model NO.:	DX6639
Standard:	ISO, CE, FDA, ROHS
Productivity:	720, 000 pcs/year.
Shipment Terms:	by sea or by air
Minimum Order:	1000
Origin:	CN
Packing:	gift box
Company:	Excel Electronic Group (HK) Limited