Wireless Microphone With Speaker: Our Top 5 Picks & Buyer's Guide Amazon.com: Pyle 4 Channel Wireless Microphone Amplifier System Home 10 Best Wireless Microphone Systems for Professional Audio Recording Amazon.com: Wireless Microphone, UHF Dual Handheld Dynamic Mic System. Product Information: Microphone type: condenser Dimensions: 245mm*70mm Wireless: no Pointing feature: Heart shaped pointing Channel: 2. 1 Input voltage: 110V Shell technology: metal + plastic Built in battery capacity: 1200 mAh 2000 mAh Battery life: 6 8 hours Signal to noise ratio: 100dB Frequency response range: 100Hz 20KHz Packing List: Microphone*1