【Small Size and Big Volume】-- ①It is a Professional Voice Amplifier with 3 inches powerful magnetic loudspeaker. Compact size (4.9 x 1.9 x 3.6 inches) and light weight (0.56 lb). ②The max 10 watts sound can cover about 10000 sq.ft (1000 ㎡). More advanced sound sensitivity and more sound penetration. The sound of S358 microphone amplifier is clear, crisp, no noise and no distortion.

【Long Battery Life】-- ①Double power, 2 pcs rechargeable batteries build inside. The 4000mAh battery provides 36-40 hours keep using. ②This mini voice speaker is charging with type-C port.

【Comfortable and Portable】-- ①Portable loudspeaker comes with an adjustable band that you can use it to tie around your waist or hang on your neck. ②Teacher speaker amplifier has a clip on the back, you can clip on a belt or the pant waistband. ③The wired headset microphone is adjustable. ④Fashionable design that is suitable for teaching, trainer, singer, coach, tour guide, shopping mall, presentation, Yoga, outdoor speech and etc.

【Upgraded Microphone Speaker】-- This speaker amplifier can work as an MP3 audio player, can be used on computers or smartphones. S358 is equipped with a mainstream USB-C charging interface. The package is including a USB Type A to USB Type C charging cable, it can be charged with 5V charger or computer USB port.