Remax RB-M9 HiFi Bluetooth Speaker
Built in 1800mAh lithium battery
Material: ABS+Fabric; The thinnest part: 20mm
Output: 3.5W*2; Sensitivity: 950mv
Frequency range: 20Hz-18KHz
Speaker frequency Range: 150Hz-18KHz
Sensitivity: 80db±2db; Signal noise ratio: ≥70dB..