Convert wired speakers into wireless Bluetooth-compatible speakers with a 3.5mm interface. Auto-connects to paired Bluetooth-compatible devices upon turning on; auto shuts down after 3 minutes of inactivity. Integrated design allows for seamless switching between transmitting and receiving modes. Built-in microphone enables hands-free amplification for clear calls, ensuring safer driving. Utilizes Bluetooth-compatible 5.3 smart chip for stable low latency, smooth connection, and long-distance transmission. Item Name: Adapter Material: ABS Bluetooth-compatible Version:5.3 Transmission Distance: Up to 10 Meters in Open Area Power Supply Mode: Type-C Interface Battery Capacity: 300mAh Working Time: RX Mode: about 6H TX Mode: about 3.5H Features: Built-in MIC, Low Latency, HiFi Sound Size Details: L: 5.7cm/2.24", W: 3.3cm/1.3", H: 1.35cm/0.53" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Adapter