Features: Support both K/J probes for temperature measurement. With -200~1372/ -328~2501 K/ J-type temperature measuring range. C/F temperature unit switching. With data hold, max/min/avg measurement function. Auto power off and cancel auto power off function. Hi, Low alarm limit setting function. With backlight and color backlight alarm function. Low battery indication function. With thermocouple temperature compensation to optimize the test accuracy. Compact size, portable and lightweight. Specifications: Model: TA611A / TA611B (Optional) TA611A: Channel: Single channel Temperature Difference: No Ambient Temp.: Range: 0~60; Accuracy: 2 TA611B: Channel: Dual channel Temperature Difference: Yes Ambient Temp.: No Measuring Range: K-type/J-type: -200~1372 (-328~2501) Accuracy: 0.2%+0.7 Resolution: (-100~-200)1/1; (-99~999.9)0.1/1; (1000)1/1 Display: 4 digits, max. 9999 Upper Limit Alarm: Default value: 1300C Lower Limit Alarm: Default value: -200C ADJ compensation: -9~9 Sampling Rate: 1 time/s Auto Power off: 10 mins (can be canceled manually) K-type Thermocouple Probe: Measurement range: -20~200C (accuracy: 2.5%) [TA611A(1pcs), TA611B(2pcs)] Working Environment: -10~50C, max. 80%RH, indoor altitude