AVer FONE540 Bluetooth conference room speakerphone (Bluetooth Speakerphone, Full-duplex microphone array with echo cancellation)

Bluetooth speakerphone – Suitable for Mid to large conference rooms up to 24 people

Touch controls for volume down/up, mute, phone input, call, and hang up
Loud Speaker volume: adjustable to 90 dB SPL at 0.5 m
Connectivity: Bluetooth, 3.5 mm phone-in Jack, 3.5 mm line out, Power input
PC or Laptop requires Bluetooth connectiivity to connect to speakerphone
Package includes: Speakerphone unit, Power adapter, Micro USB 2.0 to Type-A cable (5 m), 3.5 mm aux cable (0.9 m), Warranty card, Quick Start Guide
Daisy-chain up to 3 speakerphones or 4 microphones