Detecto’s DR660 features a lightweight capacious 21.5 Wx17.2 Dx1.97 H inches (56 W x 44 D x 5 H cm) weighing platform, integrated rechargeable battery pack (7.2 VDC / 1200mA) that is able to offer 8 hours of continuous usage, or 120 VAC 60Hz powering a 15 VDC 300 mA wall plug-in UL/CUL listed power supply (included). One inch (25 mm) high LCD digits with RS232 serial output and integral carrying handle. Optional stainless steel wall-mount grip bars also available for stability of patient (GBSS18-WM, 1 per). Key Features 1 RS232 Serial Port Built-in Rechargeable Battery Power Integral Carrying Handle Spacious Platform 1-in-high LCD 660 lb/300 kg Capacity