Versatile Functionilty

Small and Portable

This compact size makes it to carry around. This device can be used as a keychain.


K21 is certified with IP44.

Replaceable Battery

The CR2032 battery can be replaced.

Support Many Protocol

K21 support: Apple iBeacon, Eddystone URL, Eddystone UID, Eddystone Eddystone TLM.

Wide Transmission Range

This device can transmit up to 100 meters in open space.