Q: What is a breathalyzer?　

A: It is a device that you blow into to measure the level of alcohol in your blood. The purpose is to allow its user a reliable way to determine whether or not he or she is impaired.

Our portable breathalyzers are convenient, compact and easy to use, and are small enough to fit into a purse or pocket. Given the serious consequences of driving under the influence it is a very low cost, effective way, of ensuring your safety and the safety of others.

Q: How do Breathalyzers work?　

A: As the body is unable to digest or in any way chemically alter any alcohol that is consumed, it is absorbed into the bloodstream. As the alcohol in the bloodstream circulates through a person lungs, some of it will evaporate into the air being exhaled. It is this alcohol being exhaled which is measured by the breathalyzer.

Q: How can the Breathalyzer determine that I am impaired?
　
A: The breathalyzer has an alcohol gas sensor (usually a semiconductor sensor or a fuel cell sensor) to measure the concentration of alcohol in your breath. The concentration of alcohol in your breath is directly proportional that in your blood. 2,100 milliliters of your breath will contain the same amount of alcohol as 1 milliliter of your blood, thus allowing the breathalyzer to calculate your Blood Alcohol Content (BAC).

Q: When should the test be conducted?
　
A: For the most accurate reading it is best to wait 20 minutes after consuming your last alcoholic drink before using the tester. Any alcohol that is left in your mouth is highly concentrated compared to the alcohol in the breath that you exhale and as such will cause inaccurate blood alcohol readings.

Q: How do I know when I shouldn't drive?　

A: We carry three different types of breathalyzers.

1. The LED models have a series of three lights: Green, Yellow and Red. If your alcohol level is too high either the yellow light will come on showing your BAC is less than 0.05% and you should exercise caution should you choose to drive or the red light will come on showing that your BAC is higher than 0.05% and you should not under any circumstances operate a motor vehicle.

2. The LCD model displays a face. If the face is smiling then it is safe for you to drive: your alcohol level is below 0.02%. If the face displays neither a smile nor a frown, your BAC is between 0.02% -0.05% and you should exercise extreme caution should you choose to drive. If the face displays a frown under no circumstances should you operate a motor vehicle as your BAC is in excess of the 0.05% limit required to safely operate a motor vehicle.

3. The Digital models give the most specific readings in that they display in numbers what your BAC level is. If it is 0.02 or below , you are probably safe to drive. If it displays any numbers between 0.02 and 0.05 you should exercise caution when deciding to drive. If it displays ant number of 0.05 or higher under no circumstances should you operate a motor vehicle.

Q: Do they require mouth pieces?　

All of our breathalyzers are self-contained units which require no mouthpiece. Both sanitary and convenient - you will never have to buy replacement mouthpieces

Q: What is a Digital Photo Frame?

A: If you own a digital camera, you will know that digital picture frames are available to display your lovely pictures . These digital picture frames typically feature a colour LCD screen and display a slide show of your digital pictures. It is said that a picture is worth a thousand words. How many pictures are hiding on your PC? With picture frames from longcosmos, every picture can tell you a story. Our digital picture frames make it easy to share photos. The electronic picture frames come in different screen sizes starting from 1.1 inches to 10.4 inches.

Q: How Does Digital Photo Frame Works?

A: Digital Photo Frame is a device about the size and shape of an ordinary picture frame.Designed for ease of use, the digital photo frame let you enjoy your photos in the simplest way possible. You don't even need to connect it with a PC. Just by inserting a USB cable or your camera's memory card, all your photos are ready to view. It contains an LCD screen which displays multiple photos in a slideshow format, and it connects to the Internet via phone line to download new pictures and information to display on the screen.

Q: How to choose a digital photo frame?

A: It depends on the following aspects:

1. Screen Size
As with lcd picture album display the screen size of a photo album is measured in inches diagonally from corner to corner. It should be the size of the visible photo frame display and not include the surrounding frame. So some called mini digital photo frame.

2. Resolution
The resolution is the number of pixels that a picture album can display. The higher the resolution the crisper the image, higher resolutions look better on larger screen sizes.

3. Aspect Ratio
Aspect ratio is the displayed width divided by digital picture frame height, they normally come in 4:3 or wide-screen. Pictures and photographs can be cropped to fit most digital photo album.

4. Frame Style
Much time your digital picture frame will be turned off so you want to ensure that the photo picture frame itself looks cool even when it isn’t displaying a photograph on a wooden photo frame.

5. Remote Control
The remote control enables you to change the settings on a digital album from the comfort of the sofa, like with a television remote control on the photo holder.

6. Memory Cards
Adding a digital memory card to a photography album increases the number of photographs it can display. If you buy a digital photo frame that accepts the same memory card as your digital camera you will be able to swap the card between the two as we know most of digital photo viewer supports SD card.

7. Internal Memory
Some photo viewer come with internal memory. This means the photo display can store the pictures without always needing the memory card to be connected. It works well with picture display.

8. Sound
Some digital photography are used purely for displaying images while others incorporate speakers which let digital lcd frame play music or other sounds.

9. Plays Video
As well as showing your photographs, many of the newer digital picture viewer are also capable of playing video on the photo frame.

10. Optional Batteries
All the digital photo equipment that we reviewed need to be connected to an external power supply. However some of Electronic Digital Photo Frame have rechargeable batteries.  So once charged they can be hung on the wall without trailing wires (though they will need plugging in again when charging.)