2.4G Wireless Instrument Microphone Receiver with Detachable Suction Cup for Guitar Violin Cello Accordion Speakers Voice Amplifier Pickup Stage Performance Live Noise Reduction Microphone 131ft Range Transmission Frequency: 2.4G wireless microphone Microphone Type: Unidirectional (heart-shaped) condenser microphone Sending and Receiving Distance:>30 m/98 ft Wireless Coverage Distance: 131 ft/40 m (in open areas) Frequency Response: 20-20KHz Power Supply: 3.7V/130mAh rechargeable battery Usage Time: 6-8 hours Charging Time: 2.5 hours Product Style: 1 Receiver with 1 Microphone, 1 Receiver with 2 Microphones (optional) Microphone Size: 2.5 * 1.5 * 18cm/1 * 0.6 * 7.1inch Receiver Size: 2.5 * 1.5 * 6.5cm/1 * 0.6 * 2.6inch Microphone Weight: 23g/0.8oz Receiver Weight: 12g/0.5oz