Cortelcos full duplex 410 tele-conference phone's simple design and low price offer an alternative to higher priced conference phones. Features: Full-Duplex Speaker Phone On/Off with LED Mute with LED Ringer - Hi/Lo/Off Seven-Step Volume Control Redial Flash Tone/Pulse One External Microphone (Optional, sold separately) - Provides Two-Color LED (In-Use & Mute Indication)

Amplifies conversation for small groups to listen. Simply connect to phone line. On/off volume control. May require AC adapter (000031-00A-PAK). Good for training or lecture purposes when two-way conversations are not necessary. Available in Light Ash or Black.