Features: 3. It does not need any refrigerant, it can work continuously, there is no pollution source, no rotating parts, and no rotation effect.4. No sliding part is a solid piece, there is no vibration, noise, long life, and easy installation.5. Various small areas requiring heat dissipation and cooling should be used.Specifications:Material: SemiconductorColor: WhiteBrand name: BQLZRChip model:Replacement for TES1-4902Rated voltage: 6.0V49 pairs of componentsWire specification: lead length 50��8mm RV standard wire single head 5mm tin platedMaximum temperature difference: above 65CelsiusWorking current: Imax=2AAssembly pressure: 85N/cm2Working environment: temperature range -55Celsius-83Celsius(too high ambient temperature will directly affect the cooling efficiency)Encapsulation process: standard 704 silicone rubber seal all aroundPacking standard: foam box packaging, storage conditions Ambient temperature -10Celsius-40CelsiusStorage conditions: -40~60CelsiusWiring method: red wire positive, black wire negative (the literal is the cooling surface, and the non-literal is the radiating surface)Size: 2x2x0.4cm/0.78x0.78x0.16Inch(LxWxH)Weight: 14gPackage include:2 x Thermoelectric Peltier Cooler