It is a short-range wireless communication technology intended to replace the cables connecting portable of fixed devices while maintaining high levels of security. It allows mobile phones, computers

Bluetooth is specifically designed as a short-range (typically up to 10 meters) wireless cable-replacement technology. It operates on the 2.4 GHz band, supports device pairing with encryption, and enables phones, computers, headsets, and peripherals to communicate without physical cables. Its security model includes pairing authentication and encryption at the link layer.

WLAN (Wi-Fi) is a wireless networking standard focused on network connectivity and internet access, not cable replacement between individual devices, and operates at much longer ranges.

Infrared communication requires line-of-sight between devices, has very limited range and bandwidth, and was largely phased out as a cable-replacement technology before Bluetooth became dominant.

Radio-Frequency Identification (RFID) is used for automatic identification and tracking of tags attached to objects, not for general-purpose data communication or cable replacement between devices.