A device offered by the night only pays if its calculation accounts for what eats into it: breakage, hygiene, staff time and the nights when no one asks for it.

Why it matters

The payback calculation fits in one line. What decides the margin takes several. We set out both, in that order.

What the market publishes

A price per night already exists. Four Seasons Los Angeles publishes a menu of devices delivered to the room: PEMF mat, massage gun, LED face mask, compression boots and bike at 75 $ per day; heated massage glasses at 50 $ per day. Four Seasons, official page.

A rate of 50 € a night per device therefore sits at the low end of a price already displayed by a luxury hotel.

Guests already pay for wellness. Across more than 11,000 hotels analysed with HotStats in the first half of 2025, RLA Global measures total revenue per occupied room of 561 $ in hotels with a strong wellness component, against 335 $ in the others. RLA Global, 2025. This figure compares entire hotels; it does not measure the devices alone.

What is self-reported or partial

The Four Seasons Los Angeles page displays prices. It publishes no rental rate, no deposit conditions, no cleaning procedure and no breakage clause.

We found no hotel that publishes these conditions for devices worn on the body. The prices exist; the rules of use do not. That is the part we write ourselves.

What cannot be claimed

We do not say that a device is rented every night. The actual usage rate depends on the clientele, the season and the way the device is presented.

We do not say that fifteen nights of rental make fifteen calendar nights. A device requested one night in three takes three times as long to pay for itself.

We do not say that these devices treat anything. They are made available, described by their function, without claims.

What a hotel can do

The calculation. A device from the IO8 stack costs 750 € at list price. Offered at 50 € a night, it pays for itself in fifteen nights of rental: 750 divided by 50. Discounts apply from ten units; at the volume rate, payback falls below ten nights. Beyond that, each night rented is margin, and the device remains the hotel's property.

What reduces the margin. Four items, to be costed for each hotel.

• The usage rate. This is the main variable. It is tracked every month, device by device.
• Breakage and loss. The device is lent against a card pre-authorisation, with a condition check on handover and a displayed replacement price, like a rented bike.
• Hygiene. A written procedure per device, renewed covers or tips, cleaning time counted in the housekeeping schedule.
• Consumables. Masks, covers, tips: included in the price and renewed. Their cost is low but regular.

The sharing rule. The room's fixed equipment (lighting, purifier, filtered carafe) is installed and insured like the furniture. Personal items are lent, cleaned, checked. The two families are not managed in the same way.

The brand. The devices can be offered under the IO8 brand or under the hotel's own. The guest sees a hotel service, not a manufacturer's catalogue.

The order of magnitude. In our model, the investment in a complete stack is recovered within a few months. The detail depends on each hotel's occupancy rate and season: this is the subject of the Mission's financial module.

What the Living Lab measures

The Living Lab, near Lisbon, does not measure a hotel's economics. It tests the devices before a hotel offers them.

Measurement planned. For each device in the stack: lifespan in real use, incidents and breakdowns, cleaning time and method between two users, consumables needed, time to explain it to the guest. Each record will be dated and published here.

Sources

• Four Seasons Los Angeles at Beverly Hills, In-Room Wellness Menu (rates per day and per device). fourseasons.com
• RLA Global, 2025 Mid-year Wellness Real Estate Report, with HotStats, more than 11,000 hotels. Hospitality Net, November 2025. hospitalitynet.org/news/4129686

Also from the founder

Question 61 · Can the return on investment be measured?

The longevity audit for venues  ·  The Research Journal

IO8 Living Lab, near Lisbon. Measured, never promised.

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