Model: Cycling Speed Display Wireless Bluetooth Speaker PLUS MZ-508 Output power: 8W high power Battery capacity: 2200mAh, listening time 12 hours Function: BT/TF/Clock/Riding Mode, 60% volume continuous work for 10-12 hours Standby time: more than 300hr Bluetooth range: 10 meters Bluetooth version: 5.0 Charging time: 2.4 hours Rated power: 8W Waterproof grade: IP67 Can hang backpacks, waistbands, bicycles, etc.where needed, stronger than lanyards Portable:Small and thin, no power fetters, wherever you go,you can hear it wherever you go,and carry it.with you without stress. Handsfree Easy to answer:One-click answering of incoming calls,no noise and no delay in noisy environments,just like a face-to-face call. Support TF card,Plug and play Micro-SD card pre-stored music plug and play,convenient and fast. IP67 waterproof rating,Waterproof and anti-drop body, can resist rain splash, wind and sand,and daily falls. Bluetooth 5.0:Stable transmission,Using Bluetooth 5.0 technology,10 meters stable transmission, fast connection,the signal is not stuck High capacity,Long battery life:Built-in high-performance 2200mAh lithium battery,longer battery life, accompany you all day Colour:Black Material:plastic Package Contents: 1 x speaker 1 x charging cable 1 x Chinese and 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.