Kindly Reminder: This Bluetooth module is compatible with Android mobile devices only. Used for communication between the tool and mobile device via BLE. The UART port must be enabled with a baud rate of 115200 for proper operation. Operating voltage: 2.0V - 12V Onboard chip: NRF51822 Communication range: Up to approximately 15 meters Frequency range: 2.4GHz 2.4GHz multiprotocol RF transceiver ARM-M0 32-bit processor 256kB flash memory and 16kB RAM 2.0mm 7-pin 4-wire connector, cable length: 90mm Antenna length: 145mm Net weight: 3.5g Due to different production batches, the appearance, color, and printed markings may vary slightly, but this does not affect functionality. Type: V6 Color: Black Material: Composite materials Dimensions: PCB size: 27mm x 13mm Package Contents: 1 x Bluetooth Module Note: The package includes only the items listed above. Lighting and display differences may cause slight color variations between the image and the actual product. Measurement error allowance: +/- 1-3cm.