SLOSS – Invisible Keyless Entry

How SLOSS Works

Three simple steps deliver invisible access with offline security.

Step 1 – Create your code

Choose a rhythm of presses—your personal “knock.” Remember it as a Pin Code.

Step 2 – Press your pattern

Tap it on your existing doorbell.

Step 3 – Door unlocks

SLOSS recognizes your code and releases the door in seconds.

Everything happens locally inside your home. No cloud, no data sharing.

Security without complexity.

Invisible

From the outside, it’s just a normal doorbell.

Unhackable

No network connection means nothing to break into remotely.

Flexible

Give one-time or time-window restricted codes for guests or deliveries.

Durable

Modern micro controller based system, built to last.

Simple for professionals, seamless for you.

SLOSS connects to your existing electric door release system inside your home.

For most homes, that means minimal changes.

Detailled installation instructions included.

Request Installation Info

Technical guide available for professionals and partners.

Choose Your SLOSS

Three models. One system. All offline, all invisible.

SLOSS ZERO

Up to 4 access codes
One-Use codes
1 lock supported

€ 59,– excl. VAT

Full Comparison

	ZERO	UNO	DUO
Number of access codes	up to 4	up to 6	up to 6
Built-in system clock	—	✓	✓
Logfile	—	✓	✓
Time-based codes	—	✓	✓
One-use codes	✓	✓	✓
Number of locks supported	1	1	2
Price (EUR, excl. VAT)	€ 59,–	€ 99,–	€ 119,–

Optional Additions

All prices in EUR excl. VAT

	ZERO	UNO	DUO
Dual Power	€ 8,–	€ 8,–	€ 8,–
Akku trickle charge	€ 10,–	€ 10,–	€ 10,–
Akku pack	€ 30,–	€ 30,–	€ 30,–
Carrier board with pre-wiring	€ 25,–	€ 30,–	€ 30,–
SetupAPP	—	included	included
SERVO support (per servo)	€ 10,–	€ 10,–	€ 10,–
Replacement SD-Card	—	€ 5,–	€ 5,–

* Standard support is for electric strike locks operating at 6V–12V. If Akku backup power is used, ensure the electric strike is also rated for 6V–12V.

** Choose a servo operated at 5V.

Partner with SLOSS

We are interested in collaboration with installers and lock manufacturers across Europe. Request specifications, demo units, or partnership discussions.

Contact for Partnership Info

Frequently Asked Questions

Your doorbell stays. SLOSS connects from inside and communicates with your electric lock, or, when adding a Servo, SLOSS can open close certain types of mechanical locks.

Most homes connect easily. If not already there, installation of a small electric/magnetic lock (strive) or Servo-motor that opens a mechanic lock is required. Contact us for more detail.

You can always use your regular key. Optional backup batteries/Accu can also keep SLOSS active during time limited outages.

There is no APP that directly connects to the SLOSS. SLOSS UNO and SLOSS DUO come with a Setup APP, that runs on a PC and synchronizes with the SLOSS through a memory card (SD-Card).

With SLOSS ZERO the codes are generated directly on the box. SLOSS UNO and SLOSS DUO come with a small memory card (SD-Card). The SLOSS Setup APP (run on a PC) is used to or edit your codes. Then you insert the memory card into your SLOSS unit to update it. This process keeps your system completely offline—no Wi-Fi, no remote connections, and no way for anyone to tamper with it from the outside.

No. The bell silences itself with the second press.

Create temporary or one-time codes—valid only for chosen days or hours.

Yes. The SLOSS Duo version manages two locks with separate codes.

Yes. The SLOSS can keep a log of time-stamped entries and entry attempts (not SLOSS ZERO).

Designed and assembled in Munich, Germany.

Get in touch

Have questions about SLOSS or want to discuss installation or partnership opportunities?