100% new and high quality! 100% 2 times full testing before packing! Description: high quality stereo exhaust pipe audio for motorcycles/e-bikes Material: ABS + stainless steel Package includes: 1 pair of exhaust speakers + 1 remote control + accessories Working voltage: 12V Product weight : 1.8KG 12V bluetooth and FM mode wiring method: yellow wire means "+", black wire means "-".12-80V bluetooth and FM mode wiring methods: yellow wire is for "+", black wire is for "-" .12-80V Bluetooth and analog audio: the yellow wire means "+", the black wire means "-", the green wire is for the steering wheel acceleration signal wire, another black wire is for the steering wheel negative wire. What is analog audio? As the video showed, so cool. For bluetooth and analog sound mode, how to switch to analog sound? Short press the "off" button on the remote control, then the bluetooth mode will appear, then long press the "off" button to get analog sound, use the steering wheel to accelerate. Then you will hear very nice analog sound. Please note: Only 12-80V e-bike user can choose analog sound function, 12V motorcycle user can't choose analog sound function. Bluetooth connection.: Use your phone to control this motorcycle speaker and choose music, you like. 3D radio sound, the sound is very loud, don't worry about driving too fast to hear the sound. Gradual light. This motorcycle speaker is very cool and makes your motorcycle look attractive. Professional installation is recommended. More details, please read the following photos, thank you.