A British firm has released the first photos of its Fitbit-style condom that measures a man’s performance in bed.

The high-tech jimmy jacket — which looks like a small rubber bracelet — logs data during sex and sends it to the user’s smartphone, according to the creators of the i.Con Smart Condom, which released images of it Tuesday.

The reusable, one-size-fits-all band measures the number of calories burned during sex, the speed of a man’s thrusts and how long he lasts, lead engineer Adam Levers told the UK Metro.

“It’s here and it’s beautiful. We wanted the i.Con to look refined, non-intrusive and lightweight – the finished article is nothing short of any of those things,” he said. “There is absolutely no hindrance to the user and that was our main goal.”

The stretchable shaft gadget also detects STDs and is “flexible to ensure maximum comfort for all sizes,” according to British Condoms, the firm behind the condom.

The band slides onto the base of the penis and is used with a normal condom for protection.

But some critics called the idea a stretch — when it comes to privacy.

Twitter users dubbed it a “spy condom” and compared it to an “ankle bracelet” Tuesday.

Company spokesman John Simmons, however, insisted the penis ring wouldn’t flop.

“It’s truly the next step in wearable tech and we believe we have pioneered a product that will not only bring an extra element of fun into the bedroom, but will also help indicate potential STI’s present as well as prevent condom slippage,” Simmons said.

The $74 gadget hits the market in January 2018 and is available for preorder on the company website.