... + 1dbConsumption Current: 150mAVoltage: DC 7.5, li-ion batteryBattery Type: Lithium BatterySize:95x80x35 mmColor: pink ,red,black,whiteFeatures:The Rechargeable ... ,Battery life can reach 2-3 yearsCooperate with wearing type microphoneAmplification effect is goodEasy to use, can make MP3 ... 1x Color boxWith ISO,CE,ROHS etc certificates Teacher, Guide Portable Voice Amplifier Megaphone HTY-G588 black