Shelly BLU H&T Display ZB Hits US Market: World's Slimest Smart Sensor with E-Paper Display

Shelly has launched its BLU H&T Display ZB smart sensor in the US market following its European debut last year. Positioned as the world's slimmest display-equipped environmental sensor, this 9mm-thick device combines monitoring capabilities with visual feedback in a compact form factor measuring 65 x 65 mm.

The centerpiece is its e-paper graphic display showing real-time temperature, humidity, and ambient light levels alongside timekeeping functionality. Users can toggle between standard (white background) and inverse (black background) display modes for optimal visibility. The sensor's environmental data enables practical applications like preventing energy waste through overheating detection or reducing mold risk by monitoring humidity spikes.

Connectivity options include dual-protocol support via Bluetooth 5.0 and Zigbee 3.0, enabling integration with platforms like Amazon Alexa, Google Home, and Samsung SmartThings. Through the Shelly Smart Control app, users can remotely monitor conditions and create automation rules—such as triggering smart thermostats when temperatures exceed thresholds or activating dehumidifiers during high-humidity conditions.

The battery-powered design offers flexible placement options with included wall-mount hardware and a tabletop stand. At $24.99, it undercuts many display-equipped competitors while offering comparable monitoring accuracy (±0.3°C for temperature and ±3% for humidity).

Compared to Shelly's previous H&T sensors without displays, the BLU ZB adds immediate visual feedback without significantly increasing the footprint. Against alternatives like Aqara's sensors, it offers broader protocol support (Zigbee + Bluetooth versus single-protocol devices) at a lower price point than display-equipped models from companies like Netatmo.

Potential buyers should note the current stock limitation—only 300 units are available initially in black or white color options. The device suits smart home users needing localized environmental monitoring with visual confirmation, particularly those invested in Zigbee ecosystems or seeking affordable multi-protocol devices. While battery life remains unconfirmed, the e-paper display's low power consumption suggests extended operation between charges.

Available exclusively through Shelly's US online store, the BLU H&T Display ZB fills a niche for compact, visual environmental sensors at an accessible price point.