# Q: What is the difference between ITC-100VH (ITC-106VH)/ ITC-100VL (ITC-106VL)/ ITC-100RH (ITC-106RH)/ ITC-100RL (ITC-106RL)?

**URL:** <https://community.inkbird.com/t/q-what-is-the-difference-between-itc-100vh-itc-106vh-itc-100vl-itc-106vl-itc-100rh-itc-106rh-itc-100rl-itc-106rl/98>\
**Category:** Questions & Answers\
**Tags:** smart-controller\
**Created:** [October 15, 2021, 3:12am UTC](https://community.inkbird.com/t/q-what-is-the-difference-between-itc-100vh-itc-106vh-itc-100vl-itc-106vl-itc-100rh-itc-106rh-itc-100rl-itc-106rl/98 "2021-10-15T03:12:34Z")\
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**Post date:** [October 15, 2021, 3:12am UTC](https://community.inkbird.com/t/q-what-is-the-difference-between-itc-100vh-itc-106vh-itc-100vl-itc-106vl-itc-100rh-itc-106rh-itc-100rl-itc-106rl/98/1 "2021-10-15T03:12:34Z")

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A: V series products need to be connected to SSR, R series products (relay control) do not need to be connected to SSR

H stands for high pressure, L stands for low pressure

_**ITC-100VH(100-240V)/ ITC-106VH(100-240V) one SSR output+ one relay alarm output.**_

Power Supply Voltage: AC 100-240V ±10% 50/60Hz

Main Output： Voltage Pulses Output (ITC-100V): DC 12V, 30mA;

Alarm 1 AC250V 3A (Resistive load) ON/NC

_**ITC-100VL(12-24V)/ ITC-106VL(12-24V) one SSR output+ one relay alarm output.**_

Power Supply Voltage: AC/DC 12V-24V±10% 50/60Hz

Main Output： Voltage Pulses Output (ITC-100V): DC 12V, 30mA;

Alarm 1 AC250V 3A (Resistive load) ON/NC

_**ITC-100RH(100-240V)/ ITC-106RH(100-240V) one relay output+ one relay alarm output.**_

Power Supply Voltage: AC 100-240V ±10% 50/60Hz

Main Output：Relay Contact Output (ITC-100R): AC250V 3A (Resistive load) ON/NC.

Alarm 1 AC250V 3A (Resistive load) ON/NC.

_**ITC-100RL(12-24V)/ ITC-106RL(12-24V) one relay output+ one relay alarm output.**_

Power Supply Voltage: AC/DC 12-24V ±10% 50/60Hz

Main Output：Relay Contact Output (ITC-100R): AC250V 3A (Resistive load) ON/NC.

Alarm 1 AC250V 3A (Resistive load) ON/NC.