Sennheiser SKM6000 Handheld – More channels, better transmission performance: intermodulation-free handheld transmitter with maximum spectral efficiency and huge signal reliability. Via the Sennheiser standard capsule interface, compatible with Sennheiser and Neumann capsules. Up to 5.5 hours of operation with lithium-ion battery pack

Data Sheet – https://www.sennheiser.com/en-gb/catalog/products/wireless-systems/skm-6000/skm-6000-bk-a1-a4-506302

Associated Products – https://sonalyst.co.uk/services/sound/radio-systems/