1. Dual digital display temperature controller group] controller group comes with digital -C100 temperature controller + maximum 40A + K thermocouple for your use 2. [Compatibility] The temperature control is specially designed for single-phase solid state relays 3. [Proportional band (P)] 0~full range (ON/OFF control when set to 0) 4. [Time setting] Integral time (I): 0~3600 sec (no integral action when set to 0), derivative time (D): 0~3600 sec (no derivative action when set to 0) 5. [Set value (SV)] is same as measurement range (PV) 1. Product name: thermostat Power consumption: 4W Default voltage: 220V Hole size: 45X45mm Control : control Output mode: solid state relay Product weight: 161g 2. Product name: solid state relay Control : DC control AC Input voltage: 3-32V DC Control voltage: 24-380VAC Load current: 40A Ambient temperature: -30 Celsius~+70 Celsius Working frequency: 50-60HZ Control current: 3-35mA DC Product weight: 81G 3. Product name: screw type thermocouple Model specification: K type Screw specification: M6 inch Lead length: 1 meter Measuring range: 0-400 Celsius Terminal: U-shaped terminal Product weight: 16g Colour:Black Material:ABS Package Contents: 1* Temperature Controller 1* Thermocouple 1* 40DA Solid State Relay 1*Heat sink Only above package content, other products are not included. Note: Light and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.