Microphone Wireless Xlr Transmitter and Receiver 48V UHF Wireless Mic System for Audio Mixer Electric Guitar Bass Rechargeable Wireless Dynamic Microphone Transmitters Receivers Transmitter Carrier Frequency Range: 2302 MHZ-2387 MHZRF Power Output: 10 dB Frequency Response: 50 HZ-15 KHZ Microphone Pickup Head: Dynamic coil type Battery Capacity: 3.7 V 400 mAh Working Current: 22-24 mA Size: 11.5 * 3.5 * 3.5 cm/4.5 * 1.4 * 1.4 inch Weight: 51 g/1.8 oz Receiver Carrier Frequency Range: 2302 MHZ-2387 MHz Working Distance: 50-150 m/164-492 ft (depending on the usage environment) Working Voltage: DC 3.7 V Working Current: 17.5-20 mA Battery Capacity: 3.7V 400mAh Size: 11.5 * 3.5 * 3.5 cm/4.5 * 1.4 * 1.4 inch Weight: 51 g/1.8 oz