Specification: Item Type: Portable Voice Amplifier_x000D_Material: ABS_x000D_Weight: Approx. 310g/ 10.9oz_x000D_Rated Power: 5W_x000D_Separation Degree: 80dB_x000D_Distortion: 1% (3.7V, 1kHz, 1W)_x000D_Operating Voltage: DC3.7V_x000D_Charging Voltage: DC5.0V_x000D_Battery: 1PCS 2200mAh lithium battery (shipping with battery)_x000D_Display: LED display_x000D_Bluetooth: 5.0_x000D_Speakers: 1 x 2.5 in, 1 x 1.0in_x000D_Audio Format: MP3/WMA/WAV_x000D_Operating Temperature: -5~40_x000D_Instruction:_x000D_1. Put the microphone in front of your mouth for maximum amplification._x000D_2. Keep a certain distance between the microphone and the speaker. You can hang the speaker on your waist._x000D_3. Turn it on and gradually increase the volume as needed. Features: 1With high volume and low feedback features, the output power is 5W, suitable for teachers, fitness coaches. 2Large battery capacity with long service life and strong endurance, no more worry about lacking of electricity. 3The voice is transferred to the device by using an auxiliary port, supports playing memory cards, USB flash drives and FM radios. 4Light in weight, and can be easily worn on the waist or hung around the neck by using the complimentary belt. 5No need to worry about pairing or connectivity, plug and play, provide convenient using experience. PackageList: 1 x Voice Amplifier 1 x USB Cable 1 x Belt 1 x Wired Headset Microphone 1 x Instruction