Versatile Functionilty
Small and Portable
This compact size makes it to carry around. This device can be used as a keychain.
Waterproof
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.