Sky dual microphone SDM 4402A features:
Professional 2 Ch Wireless Handheld Microphone System
LCD Display
 
GENERAL SPECIFICATIONS:
PLL Synthesized
30 Selectable frequencies per Channel
Auto Frequency Selector at the touch of a button
Frequency range: UHF 470-550 Mhz
Frequency response: 40Hz-15KHz
Output plug: XLR balanced, ¼” unbalanced plug
Transmitter battery type: 2 x AA