Kingduino Compatible Bluetooth Serial Port Module

Arduino Compatible Bluetooth Serial Port Module, interface includes VCC, GND, TXD, RXD, KEY.

The CSR Bluetooth serial pass-through module features BC04-B master-slave one and LED indication connection status.

Specs:
Bluetooth Protocol: Bluetooth Specification v2.1+EDR 
USB Protocol: USB v1.1/2.0 
Frequency: 2.4GHz ISM Band 
Modulation: GFSK (Gaussian Frequency Shift Keying) 
Transmission Power: 4dBm, Class 2 
Sensitivity: -84dBm at 0.1% BER 
Rate: Asynchronous: 2.1Mbps(Max)/160 kbps; Synchronous:1Mbps/1Mbps
Security: Authentication and encryption 
Support Profiles: SPP (master & slave) 
Power Supply: +3.3VDC 50mA
Working Temperature: -20~+55C
Size: 26.7x13x2.2mm

Note: This is not an original Arduino brand product.