Stagg SUW 12H-BK Wireless Headset 2.4Ghz Microphone Professional Mic System. Frequency range: 2.4 GHZ Frequency response: 20 Hz – 20 KHz (3 dB) Pairing method: Automatic Power supply: Rechargeable lithium battery Power consumption. After 30 days faulty goods will be repaired or replaced if repair is not possible. Simply Sound and Lighting have been trading for 10 years and love providing our customers with technical advice, great service and shiny new products! We offer a wide range of sound and lighting equipment from over 30 different brands. Designed by Jarilo Design.