First of all, you can first confirm the appearance type and temperature range requirements you need. In terms of appearance, we have desktop and vertical type. LI-360(43L), LI-420(81L), LI-500(138L), LI-600(252L) are desktop models,The temperature range is RT+5℃~100℃.And others are vertical models, The temperature range is RT+5℃~66℃.