Bone Conduction Bluetooth Speaker with FM Radio Resonant Audio Speakers Wireless Stereo Sound Speak 1. Different sounds with different surfaces: This speaker uses bone conduction technology to give you a diy sound experience. You can test and enjoy different sounds - almost like using different instruments. Putting it on different surfaces like glasses, guitars, kraft paper boxes, plastic storage boxes, photo frames, sports headphones or even dashboards can give you a variety of sound effects. 2. Excellent combination experience: Bone conduction speakers are wireless connected . Two speakers can be wireless paired automatically, which provide true wireless stereo. We highly recommend using two connected speakers, you can enjoy a 5.0 surround sound experience. 3. Small but powerful speakers: If you find the right object for your bone conduction horn, speakers can be very powerful, reaching 115 decibels and allowing you to customize the sound quality. It is recommended to place thin objects such as halloween plastic boxes or buckets. 4. Multifunctional speakers: You can use bone conduction speakers to listen to music, podcasts, stand-alone phone conversations or conference calls, play games or , and even enjoy the experience of game sound. Bone conduction speakers also function as fm radios, allowing you to listen to music and follow podcasts. Function: Bone Conduction Speaker, FM Radio Wireless Ver: 5.0, A2DP, HFP Bone Conduction Transducer: 3Watt Frequency Range: 120Hz-16kHz Battery: 400mAh Polymer Battery How to Use : 1.It is automatically powered off after blue-tooth no connection in 5 minutes. 2.Short "left key" to play previous song,long "left key"to indicate sound decrease.short "right key" to play next song, long "right key"" to indicate sound increase.longpress the"middle key"to indicate power on or off,modeswitch, play/pause, answer/ hangup. 3.Bluetooth Name:-168 is displayed in wifi when pair the speaker. Tips: 1.The charging cable can be used with regular DC 5V charger,car charger,but it is not compatible with fast charger, especially DC9VandDC12Vchargers,whose output voltage is more higher than regular DC5V charger. 2.Before starting.peal off the protect fim of the stick padwhich on the bottom of speaker,then place the speaker onto thesurface of any hollow subjects. Color: Silver Material: Hardware + Plastic Package Contents: 1 x Bluetooth speaker 1 x Charging cable 1 x English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.