Product description: IPX4 waterproofing: meets the standard for water and dust resistance for everyday use.IPX4 Waterproof: Compliant with water and dust resistance standards, meeting the needs of daily life; Bluetooth 5.0: Upgraded chip, stronger compatibility, more stable signal; Applicable scenes: Suitable for cycling, motorcycling, and driving.Small size: only 3.8cm x 3.8cm x 1.2cm, easy to carry with you.Features: Long standby time: Built-in 200mAh rechargeable battery, standby time up to 7 days, and automatic sleep mode to save power. Wireless Bluetooth: Easily pair the Bluetooth multimedia key with a Bluetooth-enabled device for convenient access to multimedia applications.Media playback: Control volume, pause/play and forward/rewind of multimedia content with a simple touch of your finger.Mounting bracket: The bracket can be mounted directly onto a car steering wheel, bicycle handlebars, or motorcycle handlebars for easy and convenient use.Product Specifications: Material: Metal + ABS, Color: Silver + Black, Size: 3.8 cm x 3.8 cm x 1.2 cm, Bluetooth Version: 5.0, Battery: Built-in 200mAh rechargeable battery, Standby Time: 7 daysThe package includes: 1 x Bluetooth multimedia button, 1 x mounting bracket