Description: Waterproof is an outstanding feature of this product and you can use it for sports even in rainy days. It is comfortable to wear and you will not feel tired for a long time wearing. Bone conduction is an important selling point of the product, that is, the sound is spread by airflow without damaging the eardrum. It is made of ABS, silicone and electronic components. These materials are durable and reliable to use. The length of the product is 15cm, the width is 12cm, the height is 5cm. It is suitable for sports, jogging, hiking, etc. This product has a long standby and the composite speaker membrane has a more outstanding performance. Item Name: bluetooth-compatible Earphone Material: Silicone,ABS,Electronic Component Bluetooth Version: 5.2 Sensitivity: 120±5dB Frequency Response: 20-20000Hz Impedance: 32Ω Effective Distance: 10m Battery: Built-in 170mAh Rechargeable Battery(Included) Features: Comfortable to Wear, IPX5 Life Waterproof, Hanging-Ear Size Details: 15cm x 12cm x 5cm/5.91" x 4.72" x 1.97" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x bluetooth-compatible Earphone 1 x USB Charging Cable Waterproof is an outstanding feature of this product and you can use it for sports even in rainy days. It is comfortable to wear and you will not feel tired for a long time wearing. Bone conduction is an important selling point of the product, that is, the sound is spread by airflow without damaging the eardrum. It is made of ABS, silicone and electronic components. These materials are durable and reliable to use. The length of the product is 15cm, the width is 12cm, the height is 5cm. It is suitable for sports, jogging, hiking, etc. This product has a long standby and the composite speaker membrane has a more outstanding performance.