Make your home an LFC home with the LFC Bedside Clock with Speaker. 50 mm speaker, 3050 diaphragm, Charging power supply DC5V, 3.7V 1200mAH battery, 3W*1 RMS Output power, 150Hz-20Khz Frequency response, >75dB Signal to noise ratio, 10% distortation, 600mV Input sensitivity.