Suction cups and hooks can be used according to environmental requirements, and the hooks can be used for backpacks, riding, climbing, etc.The Bluetooth 5.0 version wireless module has an effective distance of less than 10 meters.Fully sealed design, effectively prevent outdoor splashing water and dust, and make you jump in the music anytime, anywhere.The surging power, the bass is shocking, and the 16-core internal magnetic speaker is used to interpret the good sound.Music playback time can reach 4 hours.Bluetooth version: version 5.0Theoretical power: 5wSignal to noise: ≥85dBFrequency range: 2.412ghz-2.484.Rated impedance: 4QWorking voltage: 3.7 v DCCharging voltage: dc5vFrequency range: 100hz-20khzTransmission distance: 10mBattery capacity: 850 mAhCharging time: 3 hoursPlaying time: 4 hoursPacking list: 1 * SpeakerNote:1. Please allow 0‑2cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object.reduce resonance noise. Louder, more stable and dynamic.