The XSW 1-825 Dual-BC is a two-channel analog UHF wireless microphone system from Sennheiser's XS Wireless 1 series, comprising a dual-channel receiver with built-in antennas and two handheld transmitters fitted with 825 cardioid dynamic capsules. It is designed for singers and presenters, with automatic frequency management and one-touch synchronisation for straightforward setup. The set includes microphone clips, a power supply, and batteries, and up to 10 systems can be used simultaneously in the same setting.