・Adopt CSR8510A10 chip,which is in line with Bluetooth-compatible 4.0 technical specification and dual mode transmission ・20m long transmission distance (no barrier),strong signal ・3Mbps transmission rate,provides high-speed file and audio data transmission ・CSR Harmony drive management software is easy to use,powerful,and supports a variety of application extensions (Microsoft OFFICE software) ・Ultra-low delay speed link,intelligent sleep/wake-up function,24-bit CRC check to resist interference,adaptive frequency hopping to reduce crosstalk ・Fully backward compatible with Bluetooth-compatible 2.0/2.1/3.0 specifications ・USB 2.0 interface is more universal,ultra-mini body,portable Specification: ・Model:KR11BL ・Material:plastic+metal ・Interface type:USB 2.0 ・Bluetooth-compatible version:Bluetooth-compatible 4.0 ・Feature:Bluetooth-compatible Receiver ・Product size:2.2x1.7x0.7cm Package included: ・1xKR11BL Bluetooth-compatible V4.0 Audio Receiver Wireless USB Bluetooth-compatible Adapter 20m Transmission Distance-Black ・Other items not included