WiTalk-Hub Base Station: Duplex mode: Full-Duplex (FDX) Modulation: GFSK Carrier frequencies: 1920-1930MHz Headset Connector: 3.5mm TRRS Link Connector: 3.5mm TRRS Operating range: Up to 1312ft (400m) without obstacles Frequency response: 300Hz-5KHz RF output power: Power consumption: Signal-to-Noise Ratio: ≥65dB Distortion: Power requirements: Li-ion Battery 3.7V/1200mAh or USB-C DC 5V Battery life: Approximately 5-hours (with 4 Remotes) | 2.5-hours (with 8 Remotes) Weight: 6.35oz (180g) Dimensions: 5 x 4.7 x 1.83” (127.6 x 119.4 x 46.5mm) Operating temperature: -10°C to 50℃