Support APT-X lossless transmission.</br>HIFI Bluetooth wireless two-way transmission.</br>Built-in high and low gain selection??to meet the needs of different headphones sensitivity and listening.</br>Japan Seiko protection circuits??10-12 hours of battery life.</br></br>Product Description</br></br>Parameters:<br> Size: 75mm * 42mm * 14mm<br> Weight: about 50g<br> Screen: 2.0-inch TFT high-definition displ