This Invitrogen PowerEase 500 Mini-Gel 500V Programmable Electrophoresis Power Supply is in good condition and was removed from a working environment. This unit came from a local lab that had surplus lightly used equipment. Unit is guaranteed to be in functional condition with a 30-day return policy. We urge customers to view all photos as they show overall condition, included accessories and useful information. Listing only includes what is shown in photos. Please feel free to contact us with any questions. The Invitrogen PowerEase 500 Power Supply is a microprocessor-controlled power supply for electrophoresis of pre-cast and hand-poured mini-gels. By combining high performance and programming flexibility this unit simplifies electrophoresis. This unit features: large LCD display, pre-programmed and custom methods, three step operating procedure, and a parallel port. Specifications: ? Output Range: 1?500 V (minimum step size 1 V), 1?500 mA (minimum step size 1 mA), 0.1?50 W (minimum step size 0.1 W), Automatic crossover on reaching set limits. ? Accuracy: Voltage: 2% or 2 volts, Current: 2% or 2 mA, Wattage 2% or 0.2 watt ? Drift: 1% in 8 hours after 30 minute warm-up with constant supply voltage ? Circuit Protection: Open Circuit; Short Circuit; Thermal Protection Over Voltage, Current, Wattage ? Safety: Load Detection, Thermal Shutoff (with optional temperature probe), Isolated Floating Ground ? Memory Control: Non-volatile, up to 24 hours, Custom Methods Stored to RAM ? Computer Interface: RS232C ? Display: LCD, view area 114 x 64 mm, 240 128 dots ? Dimensions (W x H x D): 16.5 cm 18 cm 20.5 cm ? Weight: 2.9 kg (6.4 lbs) ? Operating Environmental Conditions: Ambient temperature 4?30C, ?80% relative, humidity, altitude 2000 meters, indoor use only, pollution degree