The BenQ-Siemens P51 was announced in 2006, March With 2.8 inches, 42 x 57 mm, 24.3 cm2 (~33.2% screen-to-body ratio) TFT resistive touchscreen, 256K colors, Its 1.3 MP rear camera captured crisp photos and QCIF video, while the Removable Li-Ion 1370 mAh battery ensured long-lasting usage.