1. Features - It can transform any hollow object into a speaker. This bone conduction speaker is relatively small and versatile. It allows users to have a unique sound experience in various environments, and can turn any hollow object into a speaker at different times and places. - Different surfaces can produce different sound effects. This speaker uses bone conduction technology to offer a DIY sound experience. Users can test and enjoy various sound effects, somewhat like using different musical instruments. Placing it on different surfaces such as glasses, guitars, cardboard boxes, plastic storage boxes, photo frames, sports headphones, and even the car dashboard can result in different sound effects. - It is easy to carry. The product has a relatively small size and light weight, which makes it convenient to carry around. - It can produce a relatively big volume in a small body. If a suitable object is found for the bone conduction speaker, it can emit relatively strong sound, reaching up to 115 decibels, and users can customize the sound quality. It is recommended to place it on thin objects like Halloween plastic boxes or buckets. - It is a multifunctional speaker. Users can use the bone conduction speaker to listen to music, podcasts, make individual phone calls, participate in phone conferences, play games, etc., and even enjoy the experience brought by game sound effects. The bone conduction speaker also has an FM radio function, enabling users to listen to music and follow podcasts. 2. Parameters - Capacity: 400mAh - Functions: Bone conduction speaker, FM radio - Wireless version: 5.0, A2DP, HFP - Support for wireless stereo - Built - in FM radio - Bone conduction transducer: 3 watts - Frequency range: 120 Hz - 16 kHz - Built - in high - sensitivity microphone - Battery: 400mAh polymer battery - Charging port: Type - C charging port (does not support fast charging) - It is recommended to use the FM function outdoors and insert the USB data cable at the same time. 3. Material - Metal 4. Color - Silver 5. Package contents - 1 bone conduction speaker - 1 charging cable - Only the above package contents are included, and no other products are included. 6. Precautions - Light reflection and different displays may cause some slight differences between the color of the items in the picture and the actual product. The allowable measurement error is ±1 - 3 cm.