Condition: Item Type: Bluetooth Audio Receiver Material: ABS Color: Black Output Interface: 3.5mm Plug Bluetooth Version: 5.0 Bluetooth Protocol: AVRCP, A2DP, HFP, HSP SNR: 90dB Microphone Sensitivity: 42dB Frequency Response: 20Hz-20kHz Transmission Distance: 10m Output Power: 11mW RL = 16 Battery Type: Polymer Battery Battery Capacity: 110mAh Charging Time: 2 Hours Battery Life: 4-5 Hours Weight: Approx. 37g Package List: 1 x Bluetooth Audio Receiver 1 x Audio Adapter 1 x Charging Cable 1 x Manual Card Features: 1. Equipped with Bluetooth 5.0, offering improved compatibility, stability, and faster response compared to previous versions. 2. Collar clip design, compact and lightweight, compatible with OMTP and CTIA headphone plugs. 3. Connects to your phone via Bluetooth; when wired headphones are plugged into the 3.5mm jack, they become wireless headphones. 4. Can connect to car audio systems via auxiliary input using the included audio adapter. 5. Supports connection to two mobile phones simultaneously and allows seamless switching between devices. 6. Built-in high-definition noise reduction microphone supports hands-free calling, music playback, pause, volume control, and track navigation. 7. Integrated 110mAh polymer battery provides up to 4-5 hours of usage after a 2-hour charge.