2.4G Wireless Microphone Headset Wireless Microphone System Head Handheld Mic 2 in 1 for Voice Amplifier Stage Speakers Teach

High-concerned chemical : None Material : ABS Item Type : Wireless Receivers Brand Name : Shunmaii Origin : Mainland China Wireless Microphone Headset : Wireless Headset & Handheld 2 in 1 Mic Mic System : Headset Mic Wireless Microphone System : Head Handheld Mic 2 in 1 Origin : Mainland China Input voltage : DC 5V Built-in battery capacity : 100mAh-300mAh (inclusive) Signal-to-noise ratio : ≥70db Frequency response range : 60Hz-15KHz Shell process : ABS Battery life : 6-8h (inclusive) Radio head : capacitor