XS Wireless Digital Instrument Base Set. One-touch ease-of-use wireless audio set with XSW-D 6.3mm (1/4”) transmitter, XSW-D 6.3mm (1/4”) receiver, extension cable 6.3mm (1/4“), belt clip and USB-A to USB-C charging cable One-touch ease-of-use wireless audio set that utilizes a digital transmission to seamlessly link audio sources. This elegant solution makes going wireless with instruments easier than ever before while maintaining a reliable connection. Features Sennheiser XSW-D Instrument Base Set One touch ease-of-use 2.4 GHz digital transmission for worldwide operation 75m range (250ft) in optimal conditions Up to 5 hours battery life on a single charge Switch between multiple transmitters linked to one receiver Configure any combination of transmitters and receivers Mute from either transmitter or receiver THD, total harmonic distortion : < 0.1 % Charging time : typ. 3 h Audio output : max. 12 dBu Operating temperature : -10 °C to +55 °C (14 °F to 131 °F) Signal-to-noise ratio : ≥ 106 dB Operating time : up to 5 h Modulation : GFSK with TDMA Battery Specification : Li-Ion Capacity : 850 mAh Codecs : aptX Live Frequency range : 2,400 - 2,483.5MHz Max. Input voltage : typ. 5.0 V Transmission power : max. 10 mW Voltage : 3.7 V Operating relative humidity : 95 % (non-condensing) Latency : < 4 ms Temperature Range : 0 °C - 60 °C (32 °F - 140 °F) Audio frequency response : 3.5 mm Jack/XLR : 80 - 18,000 Hz, 6.3 mm Jack : 10 - 18,000 Hz