| Series | Blue Gecko |
| Package | Strip |
| Part Status | Active |
| RF Family/Standard | Bluetooth |
| Protocol | Bluetooth v5.1 |
| Modulation | GFSK |
| Frequency | 2.4GHz ~ 2.4835GHz |
| Data Rate | 2Mbps |
| Power - Output | 12.5dBm |
| Sensitivity | -104.4dBm |
| Serial Interfaces | ADC, GPIO, I²C, I²S, IrDA, PWM, SPI, UART |
| Antenna Type | PCB Trace |
| Utilized IC / Part | EFR32BG21 |
| Memory Size | 1MB Flash, 96kB RAM |
| Voltage - Supply | 1.8V ~ 3.8V |
| Current - Receiving | 9.1mA ~ 9.9mA |
| Current - Transmitting | 70mA |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C (TA) |
| Package / Case | 18-SMD Module |
