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Cardo S-640

Cardo S-640
alaScore 76

24 reviews

May, 2015

alaTest has collected and analyzed 24 reviews of Cardo S-640. The average rating for this product is 4.0/5, compared to an average rating of 3.8/5 for other Headsets for all reviews. People are impressed by the durability and price. The portability and comfort are also mentioned favorably.

sound, comfort, portability, price, durability

We analyzed user and expert ratings, product age and more factors. Compared to other Headsets the Cardo S-640 is awarded an overall alaScore™ of 76/100 = Good quality.

Review analysis

(Based on 24 reviews)

Expert Reviews  

User Reviews  

Showing 23 review(s)

Expert Reviews User Reviews
Showing 1 - 23 of 23 Show Reviews: in English | in other languages (1)

Consumer review by: ( review summary for Cardo S-640


alaTest has collected and analyzed 20 user reviews of Cardo S-640 from The average user rating for this product is 4.2/5, compared to an average user rating of 3.8/5 for other Headsets on Views about the durability and portability are overall positive. The price and sound also get good feedback.

comfort, sound, price, portability, durability

85% of the reviews on give this product a positive rating.

This summary is based on the products: Cardo Systems S640 Bluetooth HeadsetCardo System S-640 Handsfree/hands-free Clip-on Wireless in-ear Bluetooth Headset/Headphone/Earphone for Cell/Mobile PhoneCardo System S-640 Handsfree/hands-free Clip-on Wireless in-ear Bluetooth Headset/Headphone/Earphone for Cell/Mobile Phone

May, 2015

Expert review by: Family Friendly Gaming (

Cardo S-640


Family Friendly Gaming continues to branch out, grow and diversify. We have decided to do our first ever cell phone peripheral review. The Cardo S-640 revolutionalizes bluetooth by giving the user a clip on, and ear piece. One of the most interesting...

Feb, 2013

Consumer review by: swr377 (

Cardo S640 Bluetooth headset


I have had many BT headsets and couldn't stand to wear them for very long due to it bothering my ear. I had been working on making one that was like this until I stumble apon this reading Cnet. I ordered it right away from a website(a great price) and...

Lightwight earpiece unlike typical BT headsets

Would like a slightly smaller earpiece for better fit and a rubberized coating for better hold

Jan, 2008

Consumer review by: JCWPG (

Cardo S640 Bluetooth headset


What? What? Is all I heard back when I used it. Everyone I spoke to said my voice sounded muffled as if I was covering the mic. I didn't even attempt to try it in a noisy environment. Used it with three different phones same result. Ive owned/tried at...

Incoming Audio Very Clear. Light weight

Outgoing Audio Terrible

Jan, 2008

Product Specifications

If you want to enjoy the advantages of hands-free wireless communication, but you are not comfortable with over-the-ear headsets, then you will love the new Cardo S-640. It's tiny, inconspicuous and delivers great performance. The Cardo S-640 clips conveniently onto clothing and allows easy access at all times. With it, the convenience of having hands-free wireless communication is always within reach. The Cardo S-640 Bluetooth headset clips effortlessly onto clothing and allows easy access at all times so you can always stay in touch. The headset comes in high polished black lacquer, presenting an elegant choice for every outfit. The Cardo S-640 requires only one single Control Button for intuitive operation. The headset works fine with virtually all Bluetooth phones and provides excellent audio quality.

Audio Input


Audio Output

Connectivity Technology:Wireless
Headphones Form Factor:In-ear ear-bud
Headphones Type:Monaural
Product Type:Headphone
Sound Output Mode:Mono
Wireless Technology:Bluetooth

Audio System

Recommended Use:Cellular phone

Dimensions & Weight



Manufacturer:Cardo Systems
Packaged Quantity:1
Product Line:Cardo

Remote Control

Type: None

Service & Support

Type:1 year warranty