Rockville RWM1203VH VHF Wireless Dual Handheld Microphone System/Digital Disp…
You can request a specific one in the notes A. 255. 1 MHZ B. 224. 9 MHZ C. 228. 4 MHZ D. 230. 005% Modulation Mode: VHF Harmonic Radiation : 2mV Audio Output Impedance: 600Ω Audio Output Level. 5V× 2 Current Consumption: ≤ 35mA.