Item Type: Bluetooth Headset Material: Silicone Standby Time: About 150h Sound: DSP Voice Data Processing Operating Range: 510m/5.5-10.9yd Built in Polymer Lithium Battery: 70mAh Package List 1 x Earpiece 1 x Instruction Manual 2 x Ear Cap 1 x Charging Cable 1ERGONOMIC DESIGN: Bluetooth headset follows the shape of the human ear, dispersing the force points of the ear, so that the ear is evenly stressed, stable and not easy to fall off. 2HD CALL: Bluetooth earpiece adopts intelligent voice call voice reduction technology, which greatly optimizes the sound clarity and HD call. 3STEREO SOUND QUALITY: Wireless Bluetooth earpiece adopts 13mm moving coil unit with large composite diaphragm moving coil to bring lossless HIFI sound quality. 4BLUETOOTH 5.2: Wireless earpiece adopts Bluetooth 5.2 technology with low latency, fast transmission at 10M distance, stronger compatibility and more stable connection signal. 5LIGHTWEIGHT AND COMFORTABLE: Bluetooth earphone is compact and lightweight, small and mini, will not add too much burden on your ears, even if you wear it all day, it is comfortable.