GMW-216 wired+wireless gooseneck transmitter Features Cardioid gooseneck microphone included. Powered by 2 x AA batteries. Push-To-Talk and Locked-To-Talk buttons. Strong zinc die-cast metal base with non glare black finish. Offers another hands free choice. Operates with existing models of CHIAYO UHF 16-channel wireless receivers and modules. Specifications Model GMW-216 Frequency range UHF 600-900MHz Bandwidth 20MHz Switcheable frequencies 16 RF output power 35mW** Spurious emission >60dB below carrier Dynamic range >110dB Display screen LCD T.H.D. <0.5% Battery usde AA x 2 Operating time about 12 hours (Alkaline) Peak deviation ±40KHz Antenna built in Impedance 680Ω Sensitivity -50dB ±3dB Max SPL 100dB for 1% T.H.D Power requirement 6V phantom power Dimension (mm) 50(H) x 111(W) x 148(D) Base weight (g) 645 **Matched receivers QR-4000U(S), SDR-5116, SDR-2816SC, SDR-1816SC, SDR-1932 **Matched receiver modules SDR-6216m, SDR-6116m, SDR-500m **Matched portable PA systems all CHIAYO PA systems with 16-channel receiver module ** Remark: The above specifications are subject to change without prior notice. The output power may vary from country to country.