Skulpt, which has developed a smartphone-connected device that measures a user's body fat percentage  and muscle quality, raised $4.1 million in a round led by Nautilus Venture Partners with participation from Caerus Venture Partners. This brings Skulpt's total funding to at least $5.7 million.

The company plans to use the funds to expand into retail -- currently consumers are only able to purchase the device from Skulpt's website -- and add customizeable fitness plans to its companion app.

Unlike most fitness devices on the market, Skulpt's product, called Skuplt Aim, doesn't track activity. Instead, it gives users a measurement of specific fat percentage and quality of 24 different muscles. The system includes a scanning device that users place on different parts of the body and a companion app that generates the information about the muscle located there. 

The companion app can store six user profiles and also offers ‘guest’ mode that allows users to measure their friends' muscle quality without storing the data.

The company explained on its website that Skulpt Aim is backordered and that although they expected a four week delay, some customers have waited even longer. In its most recent shipping schedule the company said anyone who purchased a device between October 11 and October 28 will receive the device on November 20. And anyone who purchased a device between October 29 and November 13 will receive it on December 2.

Skulpt Aim launched last year through an Indiegogo campaign that raised $405,589, significantly over its goal. A few weeks ago, the company launched its second crowdfunding campaign, this time for its next generation device, called Chisel.

“The Indiegogo community put us on the map two years ago when we launched our first product, the Skulpt Aim," Skulpt VP of Product Juan Jaramillo said in a statement. "We wanted to give them an opportunity to order the Chisel before it’s available to anyone else, and provide us with valuable feedback that will help us make the overall product even better.”

Skulpt Chisel is similar to Skulpt Aim except it supports one user at a time, doesn't offer a display screen, and has a longer batter life, instead of one to two weeks it lasts two to four weeks. The campaign has raised $115,872, surpassing its $100,000 goal with 16 days left.