ROCKFORD URM-74 Rechargeable Wireless Microphone Product Features: High Power Sound 2-Channel Wireless -Signal-Sturdy Specifications: Selectable Sturdy: 40/Channel Operating Range: 50M Frequency Range: 650-690 MHz Battery: 18650 / 1500mAh Operating Voltage: 100-220V Handset Color: DARK GREY WHAT'S IN THE BOX: 2 X Wireless Microphone 1 X Wireless Receiver 2 X USB Cable 2 X Battery 2 X Anti-roll Rubber Ring Safety Sheet