Bluetooth Activity Markers

Light Bluetooth Marker

Light Bluetooth Marker are light weight (below 7 grams) and compatible in factory form with the Apple Airtag (so can share some accessories).

Apple Airtag form factor:

  • diameter of 31.9 mm
  • thickness of 8.0 mm
  • weighs 11 grams

Holyiot 21014

The 21014 has one CR2032 battery for up to 1.2 years (14 months) operation (actual figure depends on broadcast settings and batteries used).

External dimensions:

Internal Dimensions:

Circuit Schematic:

Broadcast features Product specifications
Chipset nRF52810
Bluetooth BLE 5.0
Protocols GATT, Eddystone, iBeacon
Current 45 uA average (with broadcast interval 500ms at 4 dBm)
Battery 1 x CR2032 (1 x 225 mAh)
Transmit +4 dBm
Diameter 30 mm
Height 8.2 mm
Waterproof No
Sample Aliexpress

References: