Our 2.4GHz Wireless Tour Guide System supports one-to-many audio transmission up to 150m. Built-in DSP noise reduction delivers crystal-clear voice. It features multi-channel anti-interference, one-key pairing, 12h long runtime, and supports broadcast & two-way talkback modes. The lightweight clip-on receiver is comfortable for long-time wear. Perfect for tour guiding, factory tours, training and business receptions, with OEM/ODM available.