Jawbone has released three fitness trackers - Up2, Up3 and Up4 - which range from basic wearables to the mobile payment American Express-enabled fitness band.

While the Jawbone Up2 (the successor of Up24) and Jawbone Up3 are available for order now, the Up4 - with wireless payment enabled from American Express - is set to make its way to consumers this summer.

All three fitness trackers do not have a display and depend on Bluetooth connection on a user's Android or iOS phone.

Here's a detailed look at what each of the fitness trackers from Jawbone have to offer.

Jawbone Up2

A basic fitness band, the Jawbone Up2 touts the same design sensibilities as its sibling Up3 - including the new clasp which replaces the previous mechanism. While the Up2 does not boast heart rate monitoring, it does pack in both sleep and activity tracking functionalities. The Up2 also has a 7-day battery life.

Compared to the Up24, the Up2 is 45 percent smaller. The fitness tracker is also splash proof and has food logging, smart coach, smart alarm, LED indicator, idle alert, goals, Today I Will and more features.

The Jawbone Up2 sees the U.S. shelves on April 15 in Black Diamond. It is available for purchase via Amazon and Jawbone for $99.99. Post April 19, the fitness tracker will also be available from Best Buy.

The Jawbone Up2 is also slated to go on sale in two more hues: light grey and silver at a later date. The international release is pegged for "later this year."

Jawbone Up3

The Jawbone Up3 is the company's 2015 flagship fitness band and will ship post April 20 from the company's online store. It is currently available for order and is priced at $179.99.

While the Up3 was announced in November 2014, the fitness tracker met with unwarranted delays owing to its splash-proof vis-à-vis waterproof ability. The splash-proof Up3 is capable of withstanding moisture when one is showering or even washing hands.

Like the Up2, the fitness tracker has sleep tracking, activity tracking, food logging, smart coach, smart alarm, idle alert, goals, Today I Will, LED Indicator and more features. Additionally, it also boast hear rate monitoring which is missing in the Up2.

The Up3's heart rate monitor is different from other trackers as it measures the bio-impedance by deploying the metal contacts which are inside. The Up3 can track the wearer's skin and ambient temperature, as well as their galvanic skin response.

Jawbone Up4

Jawbone announced its Up4 fitness band on Thursday, April 16, which is due to hit the shelves this summer. Basically, the Up4 is a beefed up version of the Up3 with NFC capabilities. That's right. The Up4 has a mobile payment system that is akin to Apple Pay built in. This payment system, however, does not require a password but pairing with the fitness band. One simply taps it to make a payment at the store.

For this Jawbone has partnered with American Express. It is the first time consumers will be able to deploy a fitness tracker to make contactless payments. The Up4 will have a NFC chip embedded in it that enables payments via AMEX.

"In partnership with Jawbone, a leader in advanced fitness trackers, we have created a seamless payment experience all in the tap of a wrist," said Leslie Berland, EVP Digital Partnerships and Development at American Express. "We believe this unique technology will delight our active, digitally-savvy Card Members in a powerful way and drive a new type of engagement at hundreds of thousands of merchant locations nationwide."

The only catch is that to make the mobile payment, a user will need to be an AMEX card holder. The Jawbone Up4 will cost $199.99.