... sound FM Radio ,Headset Microphone ,Remote control 898A Waistband Amplifier Funtion:Peak Power output: 25 WattsFrequency response: 100Hz – ... waist band, user manual. Power output: 25W Charger voltage: 12V 450mA Product weight: 355g Mic directivity Single direction ... working in 7-8 hourse Function Mp3, FM radio, Amplifier, loudspeaker, microphone, reverberation Application:Used for Yoga, Gymnastics ...