1.Cold Keeper. 2.ISO,CE Passed. 3.3years warranty. A & E Lab HK. ... ,Stirrer Hotplate,Melting Point Device,SamplerConcentration,Block Heater,Vortex Mixer,Cold Keeper,Mixer Incubator, Rocker, Shaker, Roller Mixer, PCR,etc. ... turn it on, and put the sample in, the Cold Keeper can keep your sample at low temperatures for long periods ... (0.2, 0.5, 1.5 and 2 ml) Cold Keeper (ISO,CE Passed, 3years Warranty)