ESSAGER ES-BT09 Multifunctional Bluetooth Adapter Portable Wired to Wireless BT5.3 Lavalier Converter Support Mic Wired to Wireless Reuse Idle Devices: Through the 3.5mm interface, wired devices add Bluetooth functionality. No longer bound by cables, enjoy wireless freedom Voice Navigation Focus On Driving: Connect to car audio equipment with AUX interface and increase the volume, navigation voice guidance will not let you miss every intersection Take Selfies Without Restraint: Via Bluetooth, just one click, get rid of distance restrictions and multiple angles at your fingertips. Make photography flexible and diversified Built-in Microphone 3D Stereo Surround: Bluetooth 5.3 audio decoding + HD noise reduction microphone + 3D surround sound, the vocal details during calls are richer Far & Near, All Stable: Supports 10-20 meters transmission, stable signal, let you easily get rid of the headphone length limitation Features: Bluetooth/TF dual mode, lavalier design, Bluetooth photo, Bluetooth 5.3, built-in microphone, built-in 110mAh polymer battery, suitable for multiple devices Specifications: Material: ABS Output Connector: 3.5mm Bluetooth version: 5.3 Bluetooth protocol: A2DP/AVDTP/AVRCP/RFCOMM/HFP/HSP/SPP/HID Signal-to-noise ratio: >90dB MIC sensitivity: 42dB Frequency Response: 20Hz-20kHz Transmission distance: 20m Output power: 11mW RL=16 Battery Capacity: 110mAh Charging time: 2 hours Using time: 4-5 hours Product size: 56.5 x 23 x 7mm Weight: 30g Package included: 1 x Bluetooth Adapter 1 x Charging Cable 1 x 3.5mm Audio Adaptor Other items not included