Key Features Wide Frequency Response for Clear Audio True Wireless Headset, No Bodypack Comfortable to Wear All Day Long 1000' 2-Way Operating Range DECT 6.0 for Stability and Security Instant Pairing, Easy to Use Acoustic Echo Cancellation Includes Batteries and Charger Expandable System In the Box Solidcom C1-4S Full-Duplex Wireless DECT Intercom System with 4 Headsets (1.9 GHz) Master Headset 3 x Follower Headset Charging Case 4 x Over-Ear Leather Cushion 4 x On-Ear Foam Cushion 4 x Mic Windscreen 8 x Battery USB Type-A to USB Type-C Cable Power Adapter Storage Case