Taiwanese PC maker Acer on Sunday unveiled a new Windows-based smartphone that can be upgraded to the future Windows Phone 10 operating system. The Acer Liquid M220, which currently runs on the Windows Phone 8.1 software and can be upgraded to Windows 10 later this year, is targeting budget-first consumers with a 4-inch 233 pixels per inch (PPI) display, a 5-megapixel main camera and a starting price of 79 euros (US$88.45), Acer said.

The M220 supports Microsoft's applications and services such as OneDrive, Skype, Office suit and the Cortana virtual assistant. The handset will be available in April through selected retailers in Europe, Middle East and Africa.

Also on Sunday, Acer launched three low-cost Android-powered phones -- the Liquid Jade Z alongside the entry-level Liquid Z520 and Z220.

The 5-inch Jade Z will be available in March through selected retailers in Europe, Middle East and Africa at 199 euros, while the 5-inch Z520 and the 4-inch Z220 will sell for 109 euros and 89 euros, respectively, according to Acer.

On the wearable side, Acer launched the next generation of its smart band product, the Liquid Leap+, which has a 1-inch OLED touchscreen and is compatible with iOS, Android and Windows Phone operating systems.

The waterproof fitness tracker will go on sale later this month in Europe, Middle East and Africa at 79 euros.