Sale! Add to cart AprilBeacon EEK BLE Tag beacon Eddystone & iBeacon compatible $12.00 $10.00 The Most hot sale product! EEK beacon is based on DA14580 from DialogSemi. DA14580 is designed for OTP (One-Time-Programming). It can’t be program again. You can buy our blank device for write your own custom firmware. Easy to change battery, and lower battery cost, last 1.5-3 years battery life.