Fitness band maker Fitbit lost money in 2017 after selling fewer devices during the year, as it warned over shifting consumer tastes.
The results prompted shares in Fitbit to slip as much as 14 per cent in after-hours trading. The company has lost more than 80pc of its value since floating in 2015.
Fitbit said it sold 15.3 million devices last year, down from 22.3 million devices in 2016, though the average selling prices of those devices was 8 per cent higher last year at US$101 ($139) per device.
In the crucial festive quarter, ended December 31, it sold 5.4 million devices, down from 6.5 million the same period last year.
Its revenue for the year as a whole fell to US$1.62 billion from $2.17 billion, and its net loss widened to US$277.2 million from US$102.8m. Meanwhile, its cash, cash equivalents, and marketable securities came in at US$679m at the end of the year, down from US$706m a year earlier.