It doesn't get much any more wireless than the Stage XPD2 Presentation set by Samson. It's a completely wireless lavalier set for hands-free audio streaming. Plug in the ultra-small USB stick receiver in your computer or Samson Expedition speaker and you're good to go. With an OTG adapter or Camera Connection Kit (sold separately), you can use this system with an iOS or Android device. Specifications: Product features Battery type AA Battery life (approx.) 16-20 hours Bit rate 16 bits Frequency band 2.4 GHz Headphone output yes Channel 2.4 GHz Low-cut filter no Maximum sample rate 32 kHz Maximum SPL 120 dB - 129 dB Maximum frequency 18 - 18.9 kHz Microphone accessories microphone clip, windshield Minimum frequency 50 - 59 Hz Polar pattern not specified Type of frequency band 2.4 GHz Type of USB connector USB-A Output connector USB connector Transmission power < 10 mW Weight and dimensions including packaging Weight (incl. packaging) 500 gr Dimensions (incl. packaging) 30.0 x 10.0 x 8.0 cm Product specifications Samson Stage XPD2 Presentation wireless lavalier system frequency band: 2.4 GHz PXD1 beltpack transmitter power supply: 2x AA batteries (not included) LM5 lavalier microphone includes lavalier clip RXD2 receiver USB connector mini jack headphone/line output