The Neumann KK 104 U BK (article 008721) is a black cardioid condenser capsule head designed for third-party handheld wireless transmitters. It brings Neumann's KMS 104 style condenser sound to wireless systems from other makers: Neumann lists compatibility with Shure Axient Digital, ULX-D, QLX-D and SLX-D series, all Sony models, Mipro ACT series and all Lectrosonics models. It suits singers and presenters who want studio detail on stage without changing their existing wireless platform. The cardioid capsule covers 40 Hz - 20 kHz with a sensitivity of 4.8 mV/Pa, handles up to 150 dB SPL and has a self-noise of 20 dB-A, with integrated shock mounting and pop protection that is easy to clean. The head is 48 mm in diameter, 80 mm long and weighs about 177 g, and operates between 0 and 70 C. This black version suits broadcast and stage where a discreet finish is preferred. Transmitter not included.