Freezer & Fridge Thermometer, 110dB Built-in Alarm, Hub for Remote

Works With MOCREO Hubs or On Its Own – Check this first: this freezer thermometer is an add-on sensor for the MOCREO system and pairs only with MOCREO hubs H3, H5-Lite, H5-Pro, H6-Lite and H6-Pro. It does not work with the older H1B and H2 hubs, or with hubs from other brands. It also runs on its own with no hub at all, reporting to your phone over Bluetooth within about 65 ft, so you have to be near the appliance to open the readings or get a phone notification. Add a compatible hub when you want the full picture from anywhere: live readings, your own high and low limits, and app push plus email alerts; the app you use follows the hub version you own.
Hear a Warming Freezer On the Spot, at 110 dB – Most add-on sensors can only ping a phone, so an alert dies in a pocket. This fridge and freezer thermometer has a 110 dB buzzer in the unit itself and sounds right at the appliance the moment the temperature leaves your set range, loud enough for staff moving around a busy kitchen or for anyone whose phone sits on silent. It still sounds with no hub connected and no phone in the room.
ST8 or MS2 – Pick the One That Fits Your Setup – Both are add-on temperature sensors for the same MOCREO system, and this listing carries both. Choose ST8 when you want the appliance itself to make noise: a 110 dB onboard alarm, a wider -40F to 221F range and a replaceable 9V battery, working with H1B, H2, H5-Lite and H5-Pro hubs. Choose MS2 when a hub already handles your alerts and you need a 0.9 mm ultra-flat probe that slips through the door gasket without breaking the seal, on a -40F to 158F range with AAA batteries and broader hub compatibility.
Reliable Readings Down to -40F in a Deep Freezer – A chest freezer that drifts is the one that costs you the whole load, so this cold storage thermometer reads from -40F up to 221F and keeps reporting at deep-freeze temperatures instead of dropping out, which lets you tell a normal defrost cycle from an appliance that is genuinely failing.
Probe Goes Inside, Unit Stays Outside, Door Still Closes Tight – The temperature that matters is the air next to your food, not the air outside the door. The external probe goes inside the refrigerator, deep freezer, walk-in or reach-in cooler while the unit itself stays outside, which does two more things for you: the electronics and the battery never sit in deep-freeze cold that shortens their life, and the thin cable runs out under the door gasket so the door still shuts and seals the way it should, with no frost build-up from a door held ajar.
1. 2. Up to 2 Years on One 9V Battery, Then Swap It Yourself – No proprietary pack and no charging dock: this freezer alarm thermometer runs on a single replaceable 9V (6LR61) cell that lasts up to two years, and a low-battery reminder tells you when it is time. Actual life varies with temperature and how often the alarm sounds. When it does run down, you buy a 9V anywhere and restoring monitoring takes a minute at the shelf rather than a reorder.