Sensor placement
  • Letterbox example
  • Sensor placement
  • Please check coverage at
  • Multiple letterbox setup
  • Postbox usage log

Universal letterbox sensor - Tester Edition - including 1 year network and portal services

Tax included

Own a letterbox? Would you like to be notified about new letter in? 

Switch your ordinary letterbox to smart with our world unique sensor, just insert sensor in to your letterbox and get emails or SMS notifications right after new letter inserted to your letterbox or right after it was emptied.

Price includes:

1 x Grey color letterbox sensor 

2 x AAA Alcaline batteries

1 YEAR sigfox free network subscription

1 YEAR portal subscription with 50 notification SMS credit

Further years of usage (network + portal) is 12 EUR/per year + (EU VAT applied to EU customers)


This product offers full functionality delivered in quality 3D printed box.


Volume discounts

Quantity Discount You Save
2 €3.60 Up to €7.20
4 €4.80 Up to €19.20
There are not enough products in stock

letterbox sensor properties:

SIZE  66mm x 90mm x 15mm
BATERIES  2xAAA, quaility alcaline batteries

form -20C up to +60C (outodoor version with Lithium battery) 

form 2C up to +50C (version with Alcaline battery)

BATTERY LIFETIME aprox. 2-4 years, depending on usage
OUTPUT POWER 14dbm for RC1,  24 dBm for RC2, RC4
Maximum letterbox depth 18 cm

management application properties:

Web application included in device price 1YEAR -
Mobile application included in device

1YEAR, android and iPhone

(available form end od March)

Notification targets email, sms - 50 sms free
Map View yes
Letterbox event history Yes

Network requirements:

Requires good SIGFOX newtork coverage. Please check network availability at Please send us your GPS coordinates to to check your location with coverage sigfox prediction model.

Choice apropriate zone: RC1, RC2 and RC4 is available

  • RC1:Europe: Belgium, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Hungary, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway Portugal, Slovakia, Spain, Sweden, Switzerland, United Kingdom.
    • Overseas France: French Guiana, French Polynesia, Guadeloupe, Martinique, Mauritius, Mayotte, New Caledonia, Reunion.
    • Middle East and Africa: Iran, Kenya, Oman, South Africa, Tunisia, United Arab Emirates.
  • RC2: USA, Mexico, Brazil
  • RC4:Latin America: Argentina, Chile, Colombia, Costa Rica, Ecuador, El Salvador, Guatemala, Honduras, Panama, Peru.
    • Asia Pacific: Australia, Hong Kong, Malaysia, New Zealand, Singapore, Taiwan, Thailand.