Keyestudio 4WD Bluetooth Multi-functional Car Manual page 55

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Specification：
Bluetooth Protocol: Bluetooth 2.1+ EDR Standard
USB Protocol: USB v1.1/2.0
Operating Frequency: 2.4GHz ISM Frequency Band
Modulation Mode: Gauss Frequency Shift Keying
Transmit Power: ≤ 4dBm, Second Stage
Sensitivity: ≤-84dBm at 0.1% Bit Error Rate
Transmission Speed: 2.1Mbps(Max)/160 kbps(Asynchronous)； 1Mbps/1Mbps(Synchronous)
Safety Feature: Authentication and Encryption
Supported Configuration: Bluetooth Serial Port (major and minor)
Supply Voltage: +3.3 VDC 50mA
Operating Temperature: -20 to 55℃
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