BDE-RFM204 is an ultra-low power, long-range Sub-1 GHz module targeted at low power sensors and long range applications. 
BDE-RFM204 integrates a high performance RF core and also a powerful ARM cortex-M3 processor, which makes it suitable for certain products that need high performance MCU to deal with difficult applications. 
Key Features
 Ultra low power
Sub1 GHz
 Supports 868
MHz, 915/868 MHz
 Powerful CortexM3
MCU for your IoT products
        Clock Speed: up to 48MHz
        Up to 128KB of InSystemProgrammable
Flash
        20KB of UltraLowLeakage SRAM
        10 GPIOs
 RF performance
        TX power: Up to +15 dBm
        RX sensitivity: up to 124 dBm
using LongRange Mode, 110 dBm at 50 kbps (Sub1 GHz)
 Communication
range
        800 meters (LOS) @ +10 dBm, 2.4
kbps
 Ultralow power
        Power supply: 1.8 V ~ 3.8 V
        RX: 5.4 mA
        TX @ +10 dBm: 13.4 mA
        Standby: 0.7 uA (RTC running and
RAM/CPU retention)
        Shutdown: 185 nA (Wake up on external
events)
 Antenna: PCB
antenna
 Small Size
        20.5 mm x 13 mm x 2.1 mm
 Certifications
        FCC ID: 2ABRUBDRFM204
        CERED
Download
BDE-RFM204_Datasheet_EN_V2.0.pdf