The BenQ-Siemens EL71 is a slider-type GSM triband mobile phone. Its name came about because of BenQ's acquisition of Siemens' mobile communication division at the end of 2005; the Benq-Siemens brand is meant to be transitory, before all phones are produced under the BenQ brand.

The phone supports GPRS, EDGE and Internet access methods. Its dimensions are 90 mm × 46 mm × 17 mm, and it weighs 94 grams. The supplied battery has a capacity of 570 mAh and can last up to 300 hours in standby mode, or 300 minutes if the phone is used for calls. Other notable features of the phone include a QVGA display, Bluetooth, a Java virtual machine and 1.3 megapixel camera with LED flash.