Product model: Amethyst M2   
Frequency response: 60Hz-20KHz            
Amplifier output power: tweeter:1.5W×2, 5Wx1            
Amplifier input sensitivity: ≤500mV            
Amplifier SNR: ≥75dB            
Amplifier Distortion: ≤1%            
DC input: DC9V 1.5A            
Power voltage: AC100V～240V,50/60Hz            
Lithium battery: 7.4V 2000mHA            
Battery lasting time: 6-10 hours at normal volume.         
Battery charging time: 4-6 hours.            
Bluetooth transmission distance: 7-10M without obstacle        
Bluetooth working frequency: 2.4GHz            
Bluetooth version: V2.1+EDR            
Bluetooth audio playback format: A2DP stereo