# Digital and Smart Shower Heads: Displays, Timers and Limits Source: https://www.ningboware.com/shower-heads/digital-and-smart-shower-heads/ Publisher: Cixi Zhonghe Sanitary Appliance Factory (ZHONGHE), Cixi, Ningbo, Zhejiang, China. Contact: steven@ningboware.com Updated: 2026-09-05 ZHONGHE, a shower head factory in Cixi, Ningbo, China, supplies digital shower heads with a hydro-powered LED temperature display, colour change by temperature, and timer or flow readouts. A micro turbine in the water path drives the electronics, so there is no battery. The catalog publishes 1 LED model of its 96 codes; the wider digital range is supplied per project. 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Both are hydro-powered Timer and flow | Elapsed minutes and litres used can run on the same turbine power, specified per project Battery and radio products | Bluetooth speaker and app-connected heads carry a battery and a radio, which brings EU radio rules, FCC authorisation and UN38.3 battery documents into scope Claims | A display is an indicator, not a safety device. Anti-scald protection comes from a thermostatic valve, and ZHONGHE makes no health or skin claim for any product Sourcing | MOQ ranges from 500 to 2,000 units depending on the model, finish and packaging; custom packaging from about 2,000 units. Certified options are available on request ## Two very different products share the word smart The first kind is self-powered. Water turns a small turbine inside the head, the turbine drives a generator, and the generator lights an LED and drives a small display. There is no battery, no charging, no pairing and no app. The user fits it like any other head and it works. That is the version that sells in volume, because nothing about it can go flat in a drawer or fail a pairing at eight in the morning. The second kind is a connected product: a Bluetooth speaker in the head, or a head that talks to a phone. It needs a rechargeable battery, a radio and an approval file, and it changes the importer's paperwork rather than the plumbing. Both are supplied by ZHONGHE, but they are quoted, sampled and approved on different tracks, so decide which one the programme is before the first sample round. ## How the hydro-powered display works, and what it can honestly say The turbine sits in the flow behind the face, so the display comes on with the water and goes off with it. The sensor reads the water at the head, which is where the user actually feels it, and that is a genuine advantage over a mixer-mounted gauge. The reading is still an indication: it shifts with flow rate, with a long cold pipe run and with a cold bathroom, so treat the printed figure as a guide and confirm the tolerance for your listing before it goes on the box. Colour is the part shoppers respond to. A three-colour head maps blue, green and red to temperature bands, which reads as useful information for families with young children or older users. A seven-colour head cycles for effect and says nothing about temperature. Sell each one for what it is. A colour change is not a scald guard, and the page on thermostatic products covers what actually limits temperature. ## What is realistic in the head, and what belongs in the valve Head-side electronics are limited by the power a small turbine can make and by the space behind a face plate. Realistic today: temperature readout, colour bands, elapsed time, litres used, a low-flow warning, and a backlight. Each one is a display of something the water is already doing. Anything that controls the water belongs in the valve, not in the head. Setting a temperature, holding it against pressure changes, remembering a user preference or shutting off automatically all require a mixing valve with its own power and actuator, which is a bathroom fixture rather than a shower head. Buyers who want that outcome should specify a thermostatic or digital valve behind the wall and a plain head in front of it, and ZHONGHE supplies both sides of that set. - Realistic in the head today: temperature readout, three-colour or seven-colour LED, timer, litre counter, low-flow warning - Possible but a development project: a custom display layout, a branded start-up animation, a new body around an existing module - Not a head function: holding a set temperature, automatic shut-off, app control of the water, voice control - Needs a battery and an approval file: Bluetooth audio, app pairing, any radio ## Compliance and claims discipline A hydro-powered display has no battery and no radio, which keeps it out of the radio and battery transport rules, though the electronics still fall under the general electromagnetic compatibility and product safety expectations of the destination market. Add a radio or a cell and the file grows: EU radio equipment rules and the CE marking, FCC authorisation and an identifier printed on the product or the box for the United States, and UN38.3 test documents before a lithium cell can travel. Raise the destination market in the RFQ, because the marks need space on the artwork. Claims are where these products get sellers into trouble. Do not print an accuracy figure that has not been measured on the sample, do not describe a colour change as scald protection, and do not attach a health, skin or hair benefit to any shower product. Certified options are available on request, and ZHONGHE publishes no certificate it cannot show. ## FAQ ### Does an LED or digital shower head need a battery? Not for the hydro-powered type. A micro turbine in the water path generates the power, so the display and the LEDs run only while the water flows and there is nothing to charge or replace. Battery power appears once a product has to work with the water off, which is why Bluetooth speaker heads carry a rechargeable module. ### How accurate is the temperature display? It is a guide, not an instrument. The sensor reads the water at the head, and the figure moves with flow rate, pipe run and room temperature. Confirm the tolerance and the range on the sample before printing anything on the box, and never present a display or a colour change as scald protection. Temperature limiting is a thermostatic valve function. ### Can you build a shower head with a timer and a litre counter? Yes, on the same turbine power as the temperature display, specified per project. Say which figures the listing will show, what the display should look like, and whether the counter resets per shower or accumulates, because those decisions change the module and therefore the body it fits into. ### Can the head be app controlled? A head can report to an app, but controlling the water needs a valve. Setting and holding a temperature, shutting off automatically or remembering a user preference are all mixing-valve functions with their own power and actuator. The practical build is a digital or thermostatic valve behind the wall and a plain or display head in front of it, and ZHONGHE supplies both parts of that set. ### What certification does a smart shower head need? It depends on whether it carries a radio or a battery. A hydro-powered display has neither, so it follows the general product safety and electromagnetic expectations of the destination market. A Bluetooth or app product adds EU radio rules and the CE marking, FCC authorisation for the United States and UN38.3 documents for the cell. Certified options are available on request. ## Related pages - https://www.ningboware.com/shower-heads/led-shower-heads/ - https://www.ningboware.com/shower-heads/bluetooth-speaker-shower-heads/ - https://www.ningboware.com/shower-heads/thermostatic-shower-heads/ - https://www.ningboware.com/products/led-shower-heads/ - https://www.ningboware.com/sourcing/shower-product-development-factory/ - https://www.ningboware.com/resources/importing-shower-heads-certifications-compliance/