Measure range: -50~+99oC. Mounting size: 71*29mm. Auto switch between refrigerating and heating. * Auto switch between refrigerating and heating. Retrun difference value. * Front panel size75(L)¡Á34.5(W)mm. Mounting size:71(L)¡Á29(W)mm. * Product size: 75(L)¡Á34.5(W)¡Á85(D)mm. Sensor length 2 Meter(include the probe). * Package includes: 1 x Mini Digital Temperature Controller Thermostat Aquarium, 1 x Temperature sensor probe with 2M cable, 1 x Instruction Manual, In Retail Package.