How fast does the Veyon 2417 RG cool? Can it quickly reach the 4°C required by the experiment?

Very quickly. This equipment adopts the industry-leading "miniature automatic constant temperature control system adjustment technology", and the system cools down extremely quickly. At room temperature of 25°C, the time to cool down to 4°C does not exceed 3 minutes, significantly shortening the waiting time for experimental pre-cooling.