Features: 1. The compatible with Bluetooth communication protocol is embedded inside the product, so there is no need to install another driver and it can be used in for Windows system. 2. Adopt CSR compatible with Bluetooth chip that supports compatible with Bluetooth 2.1 standard. Enhanced BER error rate performance and automatic frequency hopping technology ensure efficient and safe communication, and have more powerful anti-interference ability to ensure communication stability and reliability. 3. Support compatible with Bluetooth Serial Port Profiles (SPP), which can connect and communicate compatible with Bluetooth-enabled laptops, desktop computers compatible with Bluetooth adapters, handheld compatible with Bluetooth PDAs, compatible with Bluetooth GPS and other devices that support compatible with Bluetooth SPP services. 4. The transmitting power is in line with the compatible with Bluetooth Class2 standard. The built-in high-sensitivity Printed Circuit Board printed antenna has a stable communication distance of up to 15 meters and can transmit wireless data through the wall. 5. RS232 serial compatible with Bluetooth adapter needs to supply power to the adapter through the MiniUSB interface on the adapter. 6. Equipped with the RESET reset button to delete the paired device information saved in the adapter and re-pair with the new compatible with Bluetooth device. Specification: Condition: 100% Brand new Executive Standard: Compatible with Bluetooth SIG v2.1+EDR, Compatible with Bluetooth Protocol: Compatible with Bluetooth serial port profile (SPP) Interface Interface: RS232 Communication Rate: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600, 1382400bps Modulation Method: 2.4G ISM Direct sequence frequency hopping (FHSS) Communication Distance: 15 meters in open space, Class 2 level Transmit Power: 4 dBm Acceptance Sensitivity: -79dBm Working Voltage: 5V Operating Current / Sleep Current: 40mA / 1.6mA (typical) Working Environment Temperature / Storage Ambient Temperature: -10-50℃/ -20-80℃ Size: Approx. 56.5 x 38.5 x 14.5mm / 2.2 x 1.5 x 0.6in Package List: 1 x Serial Module 1、The compatible with Bluetooth communication protocol is embedded inside the product, so there is no need to install another driver and it can be used in for Windows system. 2、Adopt CSR compatible with Bluetooth chip that supports compatible with Bluetooth 2.1 standard. Enhanced BER error rate performance and automatic frequency hopping technology ensure efficient and safe communication, and have more powerful anti-interferenc 3、Support compatible with Bluetooth Serial Port Profiles (SPP), which can connect and communicate compatible with Bluetooth-enabled laptops, desktop computers compatible with Bluetooth adapters, handheld compatible with Bluetooth PDAs, compatible with Blue 4、The transmitting power is in line with the compatible with Bluetooth Class2 standard. The built-in high-sensitivity Printed Circuit Board printed antenna has a stable communication distance of up to 15 meters and can transmit wireless data through the wa 5、RS232 serial compatible with Bluetooth adapter needs to supply power to the adapter through the MiniUSB interface on the adapter.