Wireless BT Module, with this Bluetooth module, you can quickly add Bluetooth functionality to your project, and then you can use Android phones to control gadgets such as switches and LEDs. Features: Bluetooth UART RS232 serial converter module for easy transfer of UART data. Support Bluetooth connection through AT command, set baud rate, password, save parameters after setting parameters. Enhanced data rate (EDR) conforms to the 2Mbps and 3Mbps modulation modes of the V2.0.E.2 specification. Full speed Bluetooth operation, support for full Piconet and Scatternet. On-board 3.3V regulator chip, ROHS compliant, compact size. Specifications: Bluetooth software stack, you can use this Bluetooth module with your system: * For MCU, ARM or For DSP system. * For SOC system. * Personal Digital Assistant (PDA) * Computer Accessories * Other systems you want to use under Bluetooth. UART interface and baud rate setting function Support on-board 8Mbit external flash memory Support for 802.11Co-Existence Hardware: CSR solution, Bluetooth V2.0 protocol Support AT Commander Support Master and Slave modes, modified by AT Commander. Support 1200-115200 baud rate. Power: 3.3V single power supply Core module size: Approx. 27 x 12.8 x 2.35mm/ 1.06 x 0.50 x 0.09in Overall module size: Approx. 44.7 x 15.7 x 3.7mm/ 1.76 x 0.62 x 0.15in Package Include: 1 x Wireless Bluetooth Module .