HTC has formally announced the Butterfly S 5-inch smartphone, Digital Spy said.

The device sports a 1080p Super LCD 3 display with a 440ppi resolution, and includes many of the same features as the flagship HTC One handset.

Powered by a quad-core 1.9GHZ Snapdragon 600 processor and 2GB of RAM, the Butterfly S comes with a 4-megapixel camera backed up by UltraPixel tech on the rear and a 2.1-megpixel snapper on the front.

Other features include 16GB of storage, a quad-band HSPA/WCDMA radio and a 3200mAh battery for extended usage time.

The device will be available in grey, white and red in HTC's native Taiwan for NT$22,900 ($489), according to Engadget.

HTC is yet to confirm plans to release the phone in other territories.