Bluetooth receiver transmitter combo Built-in noise cancellation and ANC technology for clear, high-quality stereo sound Equipped with a built-in battery for long-lasting performance Compatible with Android, iOS smartphones, tablets, and all Bluetooth-enabled audio devices Easy setupno drivers or app downloads required Features embedded ARM926EJ-S core with 4KB I-cache and 4KB D-cache Supports stereo audio codec Supports HFP, A2DP, AVRCP, and SPP profiles Active noise reduction and ambient noise cancellation Multi-band equalizer settings Includes packet loss concealment technology Supports multipoint HFP and A2DP connections Voice prompts for easy operation Integrated lithium-ion battery charger with 200mA fast charging and over-discharge protection Color: Black Material: ABS Size: 9.8 x 5.9 x 1.2 cm Package Contents: 1 x Bluetooth Transceiver 1 x 1.2m Audio Cable 1 x USB Charging Cable Note: This package includes only the items listed above. Other accessories are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual product. Measurement tolerance: +/- 1-3 cm.