Back-up beeper alarm | 9-28V | Marco 104 121 15

45.59 Price ex.Vat

In stock (can be backordered)

02 - 04 units | Per unit: 44.68
05 - 10 units | Per unit: 43.31
11 - 100 units | Per unit: 34.65


Marco 104 121 15, BK2

Universal voltage waterproof horn with intermittent sound, particularly suitable for signalling operations such as: opening of deck and engine compartment; pulling out of gangways; crane, davit and cathead operating; malfunctioning of electronic devices.


  • Multitension
  • IP 67
  • 1 powerful intermittent sound

Technical data:

  • Voltage: 9 – 28 VDC
  • Spl @ 1 m: 100 dB
  • Frequency: 1850Hz ±5%
  • Operating temperature: -30°C(-22°F) +80°C(+176°F)
  • Current consumption: 500 mA
  • Pulse rate: 1,4 Hz ± 5%
  • Loudspeaker: 16 Ω
  • IP Protection: IP 67
  • Weight (kg): 0,2
  • Reference: Marco 104 121 15
  • Type: BK2
  • IP 67: Code, International Protection Marking.
    Dust tight: No ingress of dust; complete protection against contact (dust tight)

    Immersion up to 1 m: Ingress of water in harmful quantity shall not be possible when the enclosure is immersed in water under defined conditions of pressure and time (up to 1 m of submersion).
    Ingress Protection code documentation

Wiring Diagram

Back-up beeper alarm | 9-28V | Wiring Diagram, Marco 104 121 15, BK2 Back-up beeper alarm | 9-28V | Wiring Diagram, Marco 104 121 15, BK2


Back-up beeper alarm | 9-28V | Dimensions, Marco 104 121 15, BK2


MARCO manufacture electric and air horns for cars, trucks and boats, as well as electric pumps for the transfer of various liquids.

These products are manufactured using the most advanced production equipment, such as spectrum analysers, vibrating stands, and other sophisticated instrumentation, including an anechoic chamber, for the development and testing of products.

Today the use of advanced technology enables MARCO to reach the highest International Quality Standards, allowing the creation of highly competitive products that are exported daily to over 80 countries.

Delivery Services

We have a number of Home Delivery services available to you. Availability of these options will be shown at checkout.

International Delivery

We offer delivery to European and many international destinations. For European countries, prices start from £3.00 – €4.00 and are calculated at the checkout page. Click here for a price guide.
For non-European countries, please select your parts and check out normally selecting your country.


At we hope that you are happy with your purchase, however we know that sometimes you will need to return or cancel an item. Any products returned must be in a re-saleable condition & include the original packing and documentation.

  • Quickparts must be informed of any return requests within 30 days of the original order date.
  • Before returning any goods please read our Terms and Conditions

You’ll find returns information on your delivery note. Unless faulty, we’d like you to make your return within 90 days of purchase. Exceptions apply to certain products – find out more about our refund policy.


Additional information

Weight 300 kg
Dimensions 103 × 44 × 80 cm