【Advanced 5.4 Technology】Utilizing the latest Bluetooth-compatible 5.4 protocol with EDR+BLE technology for enhanced connectivity and performance. 【Plug and Play】System driver-free design allows for immediate use upon plugging in, compatible with Windows 8/10/11 operating systems. 【Stable Long-Range Connection】Maintains a stable signal up to 20 meters, ensuring reliable connectivity across rooms. 【Multi-Device Support】Capable of simultaneously connecting and managing up to 5 devices for efficient multi-tasking. 【Smart Pairing Memory】Features automatic pairing memory, allowing for instant reconnection upon powering on. 【Compact Design】Ultra-portable size of 29*7.84*14.5mm makes it perfect for on-the-go use with laptops and desktops. Specifications: Material: PC+ABS Chip: Bestechnic 8654 Bluetooth-compatible Version: 5.4 Wireless Protocols: A2DP, AVDTP, AVRCP, RFCOMM, HFP, HSP, SPP, HID, etc. Firmware Version: HCI 13.515/LMP 13.5 Transmission Range: 10-20 meters Dimensions: 29×7.84×14.5mm