Hollyland Wireless Intercom System Set of 8 Headset Solidcom C1 Pro

Includes 16 batteries and a battery charger.

Advanced Dual-Mic ENC, PTT function, wideband audio (150Hz–7kHz), and a
1,100ft (350m) reliable range. It is also DECT 6.0-enhanced for superior
stability, ultra-long duration, and increased portability and
durability