Product Description The VWR Performance Series Manual Defrost Laboratory Freezers feature a digital microprocessor temperature controller allowing for the precise temperature management necessary for critical samples and supplies. Monitoring and alarms Sample-simulated temperature display Full alarm package Alarm mute with ring back Adjustable volume Alarm battery backup Remote contacts Alarm validation Data acquisition 24/7 data logging 24-hour digital temp chart Min/max temp history USB port for data transfer 4-20mA output Caster platform adds four inches to height A manual defrost design prevents product damaging temperature spikes from defrost cycles. Defrosting of the unit must be performed periodically to prevent severe ice build-up. Standard Features Package includes Keyed Door Locks, Caster platforms, Sample-Simulated Probe, Probe Access Port. Ordering Information: Three-year parts and labor warranty, five years on compressor parts. UL/C-UL listed.