ESSAGER ES-BT09 Multifunctional Bluetooth Adapter Portable Wired to Wireless BT5.3 Lavalier Converter with Built-in Microphone • Wired to Wireless Conversion: Adds Bluetooth functionality to wired devices via 3.5mm interface. Enjoy wireless freedom without being limited by cables • Voice Navigation for Driving: Connects to car o systems with AUX input. Enables clear voice guidance for navigation, helping you stay focused on the road • Hands-Free Photo Capture: Take selfies wirelessly with one-click Bluetooth control. Enjoy flexible shooting angles without distance constraints • Built-in Microphone with 3D Stereo Sound: Equipped with Bluetooth 5.3 decoding, HD noise reduction microphone, and 3D surround sound for clear, rich vocal detail during calls • Stable Wireless Connection: Supports up to 20 meters transmission range with a stable signal, eliminating the limitations of headphone cable length • Dual Mode Functionality: Supports Bluetooth and TF card playback. Features lavalier design, built-in microphone, and Bluetooth 5.3 technology. Compatible with multiple devices • Built-in 110mAh Polymer Battery: Provides 4–5 hours of usage time. Charges fully in approximately 2 hours Specifications: • Material: ABS • Output Connector: 3.5mm • Bluetooth Version: 5.3 • Bluetooth Protocols: A2DP, AVDTP, AVRCP, RFCOMM, HFP, HSP, SPP, HID • Signal-to-Noise Ratio: >90dB • MIC Sensitivity: ±42dB • Frequency Response: 20Hz–20kHz • Transmission Distance: Up to 20 meters • Output Power: 11mW RL=16Ω • Battery Capacity: 110mAh • Charging Time: 2 hours • Usage Time: 4–5 hours • Product Dimensions: 56.5 x 23 x 7mm • Weight: 30g Package Included: • 1 x Bluetooth Adapter • 1 x Charging Cable • 1 x 3.5mm o Adapter • Other items not included