Function key operation Introduction: 1. To switch music or FM: short press M 2. Last song/Next song: short press the volume key 3. Turn up/down the volume: Long press the volume key In FM radio mode: Press "M" to enter FM mode. 1. Press the power button for the first time to switch FM channel and search automatically, and press the power button for the second time to cancel the search.It will take several minutes to search the entire space station.After the search, you can press the volume button to select your favorite channel. 2. To switch channels: short press the volume key 3. Turn up/down the volume: Long press the volume key Note: In FM radio mode, Audio cable into the charging port as FM antenna. TWS serial mode: 1.2 Speakers of the same model start up at the same time 2. Long press The M key after power on until the sound is emitted and the speaker is paired

Specification Bluetooth version: 5.0 Bluetooth distance:<33Ft Support: FM, TF card input, U disk input, 3.5mm audio input Extended memory: 32G(Not included) Battery capacity: 1200mAh Charging Time: 2-3 hours Listening/Talking time: 6-8 hours Waterproof level: IPX5 Charging parameters: 5V Support music format: MP3, wav, wma, FLAC, APE Frequency response: 70Hz-20KHz Signal to noise ratio: ≧95dB Distortion rate: <0.5% Material: ABS, mesh Color: Black, Blue, Red, Green, Camouflage