# Smoke detector Jalo Helsinki J4B-11 photoelectric wireless, battery 9V lithium

**URL:** https://aio.lv/en/product--jalo-helsinki-j4b-11--1074422
**Data updated:** 2026-04-24 10:26 (EEST)
**Category:** Sensors & Detectors
**Manufacturer:** jalo helsinki
**Manufacturer code:** J4B-11
**EAN:** 6430038437907
**Warranty:** 5 Years
**Availability:** Available for order
**Price:** 35.49 €
**Prices and availability valid until:** 2026-07-29 23:59
**Price without VAT (21%):** 29.33 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--jalo-helsinki-j4b-11--1074422

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.89 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

Jalo Helsinki J4B-11 is a photoelectric (optical) smoke detector with wireless capability, powered by a 9 V lithium battery. It uses photoelectric reflection sensing to detect smoldering fires early. Suitable for residential and commercial indoor use, it provides reliable smoke detection and simple battery-powered installation where mains supply is unavailable.

## Long description

Kupu 10 by Harri Koskinen is a battery-powered photoelectrical smoke alarm designed for domestic use. This model (listed as Jalo Helsinki J4B-11) uses a 9 V lithium battery and features an optically based photoelectric sensor in a compact round housing measuring approximately 110 mm in diameter and 41.4 mm in depth.
Advantages
The photoelectric reflection detector offers reliable detection of smoldering fires and slower-developing smoke, while the battery power ensures installation without wiring. Its compact 110 mm diameter and low profile make it suitable for ceiling mounting in homes where a discreet appearance is preferred. The lithium battery provides stable input voltage and long-lasting operation compared with standard alkaline cells.
Suitable for
Home ceilings in bedrooms, living rooms and hallways
Installations where mains wiring is not available or not desired
Locations requiring a low-profile, compact smoke alarm
When it may not be suitable
This photoelectric battery-powered alarm may not be the best choice where interconnection with other alarms or integration into a hardwired building alarm system is required, since it is designed primarily as a standalone unit. It may also be less responsive to very fast-flaming fires that produce little visible smoke in the early stages.
Key specifications
Detection principle: Photoelectric (optical reflection)
Power source: Battery (lithium), nominal input voltage 9 V
Dimensions: approximately 110 mm diameter × 41.4 mm depth
Mounting: ceiling surface mount
How to use
Install the detector on a ceiling according to local safety guidelines and the mounting instructions included with the product. Fit a 9 V lithium battery, test the unit after installation using the test button if present, and replace the battery as recommended by the manufacturer or when the low-battery signal activates. Keep the sensor area free of dust and paint to ensure reliable operation.
What to consider before purchase
Whether you need interconnection with other alarms or a hardwired system
Desired battery lifetime and availability of 9 V lithium batteries
Ceiling height and placement to ensure optimal smoke detection
Usage recommendations
Place the detector on the ceiling away from air vents, fans and kitchen cooking zones to reduce false alarms; test the unit after installation and at regular intervals, and replace the battery promptly when indicated.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.137 kg |
| Battery technology | Lithium |
| Operating relative humidity (H-H) | 0 - 90 |
| Operating temperature (T-T) | 0 - 45 |
| Power source | Battery |
| Height | 110 mm |
| Input voltage | 9 |
| Width | 110 mm |
| Depth | 41.4 mm |
| Connectivity technology | Wireless |
| Product colour | Chrome |
| Detector type | Photoelectrical reflection detector |
| Compatible battery sizes | CR17450 |
| Test button | Yes |
| Best uses | Home |

## FAQ

### How much does the Jalo Helsinki J4B-11 smoke detector cost, and is it available for purchase?

The price is 35.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 13.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All jalo helsinki products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized jalo helsinki service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/1074422/57907124_large.webp