<p>.</p> <p>Fine workmanship and perfect style.</p> <p>Bluetooth version: Bluetooth V5.3</p> <p>Supported protocols: RX: A2DP AVRC TX: A2DP</p> <p>Working frequency band: 2.402GHz -2.480GHz</p> <p>Power level: Power level 2 (Class II)</p> <p>Sensitivity: -85dBm Less than 0.1%BER</p> <p>Signal-to-noise ratio: \u226590dB</p> <p>Distortion: \u22640.1%</p> <p>Interface Type</p> <p>Input: 3.5mm AUX++Optical+Coaxial+USB</p> <p>Output: 3.5mm AUX+</p> <p>Optical fiber parameters: supports optical fiber input, sampling rate supports 32\/44.1\/48\/96\/192KHz, 24bit</p> <p>Supported formats: MP3\/WAV\/WMA\/APE\/FLAC\/M4A\/ALAC\/</p> <p>Screen size: 25x10mm LED</p> <p>Working current: Less than40mA</p> <p>Built-in battery: 3.7V\/1000mAh (3.7W)</p> <p>Charging current: about 1000mA</p> <p>Charging time: about 1.5 hours</p> <p>Battery life: RX about 10H, TX about 10-12H</p> <p>Bluetooth distance: 10-20M (without barriers)</p> <p>Charging method: Type-C 5V\/1000mA</p> <p>Compatible devices: Suitable for Android and IOS mobile phones and PADs, active speakers, power amplifiers and Bluetooth speakers or headphone connections that support A2DP\/protocol</p> <p>Material: abs</p> <p>colour: Black</p> <p>Package Contents: </p> <p>1 x Bluetooth adapter host</p> <p>1 x Type-C charging cable</p> <p>1PCS x 3.5mm audio cable</p> <p>1 x Red and white lotus cable</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>