KW-M804 receipt printer: POS guide, 80 mm paper and setup

The KW-M804 is an 80 mm thermal receipt printer designed for the point of sale (POS) in bars, cafés and shops. It prints at 160 mm/s using direct thermal technology, so it uses no ink or toner: its only consumable is the roll of thermal paper. It is compact (0.85 kg), ultra-quiet and low-power, speaks the standard ESC/POS language and is available for 60.99 € with 24 h delivery to mainland Spain. In this guide you will see what it does, how to set it up, which paper to buy and when to choose it over the faster KW-M806.

Key points

• Pure direct thermal: it prints using heat on heat-sensitive paper, with no ink, no toner and no ribbon.
• 160 mm/s print speed and a printhead with a 150 km service life, plus an automatic cutter rated for 1.5 million cuts.
• Ultra-quiet and compact (0.85 kg): it fits on narrow bars and counters without disturbing the customer.
• ESC/POS language and firmware updates over the internet (IAP), with advanced support for 2D QR codes on receipts.
• 60.99 €, in stock and with 24 h delivery to mainland Spain from Startoner.

What the KW-M804 is and who it is for

The KW-M804 is an 80 mm thermal receipt printer for the point of sale. Its 80 mm format is the standard across the hospitality and retail sectors, the one that most POS terminals, till software and order handhelds expect. It is designed for restaurants, cafés and shops that need to produce receipts quickly and continuously without drawing attention with noise.

Two features make it especially convenient on a counter: its compact, lightweight design (0.85 kg) and its ultra-quiet operation. On a bar or at a small till, space and quiet matter as much as speed. On top of this comes its low power consumption, which helps when the unit stays switched on for many hours every day.

If you are deciding which thermal device fits your business, we recommend first reading our pillar guide thermal printer for businesses, where we explain the differences between receipts, labels and other formats. And if you want to compare models, you can browse the full thermal printer collection available.

The thermal truth: no ink, no toner, no ribbon

It is worth being clear about this from the outset so you do not buy consumables you do not need: the KW-M804 is a direct thermal printer. This means it prints by applying heat to heat-sensitive paper that darkens in the areas warmed by the printhead. It has no ink cartridges, no toner and uses no ribbon or transfer film. The only consumable you will get through is the 80 mm thermal paper rolls.

This is a fundamental difference compared with a laser or inkjet printer. If you are coming from that world and want to understand the contrast, we have an article dedicated to ink cartridge or toner. With a thermal receipt printer, that decision disappears: there are no cartridges to replace, only paper.

The trade-off with direct thermal is that the paper is sensitive to heat and light over time, which is perfectly acceptable for a purchase receipt or an order slip, both of which have a short lifespan. In return, you gain simple maintenance and a very modest cost per receipt. If you are interested in the economics of printing, we go into detail in the real cost of printing.

Performance, durability and QR codes

For counter use, the KW-M804 offers a very sensible balance between speed and robustness:

• 160 mm/s print speed: enough to serve up receipts smoothly in most bars, cafés and shops.
• High-endurance printhead with a 150 km service life: designed to withstand intense daily use for a long time.
• Automatic cutter rated for 1.5 million cuts: it cuts the receipt on its own, without staff having to tear it off by hand.
• Low power consumption and ultra-quiet operation: ideal for settings where the customer is close to the till.

A useful extra for both marketing and operations is its advanced support for high-definition 2D QR codes. You can make the most of the receipt itself to include a QR code for satisfaction surveys, digital payments or promotions, turning a receipt into a small communication channel with the customer. If you are interested in how the sector is evolving, take a look at our 2026 printing trends.

Setup and the ESC/POS language

The KW-M804 uses the ESC/POS language, the de facto standard for receipt printers. This is good news for compatibility: most POS and cash-register software speaks ESC/POS, so integration is usually straightforward. The usual setup steps are:

• Load the 80 mm roll: open the lid, insert the thermal paper roll with the sensitive side facing the right way and close it until you hear the click.
• Connect the printer to the mains and to your computer or network according to the interface in your installation.
• Set it up in your POS software by selecting a driver or profile compatible with ESC/POS.
• Print a test receipt to confirm speed, automatic cutting and QR printing if you are going to use it.

A long-term maintenance advantage is its online update technology (IAP): the unit can update its firmware over the internet, so you can receive improvements and fixes without changing hardware. If you want to check the print quality of any device, our print test page can serve as a reference.

Which paper to buy: 80 mm and BPA-free

The KW-M804's consumable is the 80 mm thermal paper roll. It accepts standard rolls of that width, so you are not tied to a proprietary consumable. Our clear recommendation is to always buy BPA-free rolls (labelled "BPA-free" or "phenol-free").

This is not just a matter of good practice: it is European law. The Reglamento (UE) 2016/2235 has, since 2 January 2020, banned thermal paper containing bisphenol A (BPA) at a concentration equal to or above 0.02% by weight. You can consult the official source at EUR-Lex. So when you restock paper, check that the rolls expressly state that they are BPA-free.

Remember: with this printer you only buy paper. There is no ink, toner or ribbon to replace, which greatly simplifies managing your consumables stock in a business with a till.

KW-M804 or KW-M806: which to choose

Both are 80 mm thermal receipt printers with the ESC/POS language, but they target different working paces:

• KW-M804: cheaper and quieter, with a speed of 160 mm/s. It is the balanced choice for most bars, cafés and shops with a normal or moderate flow of receipts.
• KW-M806: faster, at 300 mm/s, designed for very high-traffic scenarios where the till never stops at peak times.

If your priority is a quiet, compact, keenly priced unit for a normal pace, the KW-M804 at 60.99 € is a very sensible choice. If, on the other hand, you handle very high volumes on a sustained basis, the M806 is worth considering. Either way, both share the same logic: direct thermal, 80 mm paper and zero cartridges.

You can see all the details, availability and purchase options on the KW-M804 thermal receipt printer product page.

Why buy it from Startoner

At Startoner we handle printing consumables and equipment with ISO 9001 quality controls, dedicated customer support and a 3-year legal guarantee. The KW-M804 is in stock with 24 h delivery to mainland Spain, so you can get it up and running in your business as soon as possible. And since any consumable you need afterwards is simply BPA-free 80 mm thermal paper, restocking is easy and inexpensive. If you are interested in the guarantee framework for our products, we explain it in legal guarantee in Spain.

Frequently asked questions