Feature
1. FM Radio
2. Different device can exchange information
3. Alarm with time accuracy below 1ms daily
4. Alarm to talk hour and specified voice
One time charge to survive 1 month
Time sync with GPS or BLE
Voice sync with BLE thru handset, handset can deliver voice thru network as answer machine
Each device can sync time, radio station and voice information thru RDS or BLE
Hardware
BLE: nRF51822
GPS: SkyTraq Navspark
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