Sennheiser XSW 1-825 DUAL-A Wireless Vocal Set 100737846 These signals can be combined

These signals can be combined with the AIR15's internal mixer

The Electro-Voice Evid EVID-S12

Shure ULXD2/K8N ULXD Handheld Transmitter - Nickel

5mm TRS unbalanced output

Steel threaded rails

Sennheiser XSW 1-825 DUAL-A Wireless Vocal Set 100737846 These signals can be combinedSennheiser XSW 1 825 DUAL A Wireless Vocal Set Raise Your Voice. Easy to use all in one wireless system for singers and presenters. Raise your voice. Go for XS WIRELESS 1 and rely on a solid wireless transmission with up to 10 compatible channels in a stable UHF band. The XS WIRELESS 1 VOCAL SET is an easy to use all in one wireless system for singers and presenters, excellent for live sound featuring Sennheisers renowned evolution microphone