General
• Speakerphone weight: 220 g / 7.76 oz
• Connectivity: USB 2.0 & Bluetooth
• USB cable length: 2.6 feet / 0.8 meter
• Touch Buttons: ower，Bluetooth, Call answer, Call hangup, Volume up, Volume down, Mute

Wireless Technology
• Bluetooth standard: Bluetooth 4.0
• Wireless Range: 100 feet / 30 meters
• Supported Bluetooth profiles: Hands free profile v1.7, A2DP v1.2, AVRCP v1.3
• PC USB Bluetooth dongle (Yealink BT50): USB BT audio device/HID dongle. Bluetooth 5.0

Battery
• Battery: Lithium Polymer
• Capacity: 1420mAh
• Charging time/power: 3 hours (5V/500mA)
• Max. charge current: 1.4A
• Talk time: 10 hours
• Standby time: 360 days (Power safe after 30min)

Microphone
• Type: Omnidirectional microphone
• Signal to Noise Ratio (SNR): +58 dB
• Pickup range: 5 feet / 1.5 meters
• Frequency range - Conference mode: 100Hz-8kHz

Speaker
• Peak output power: 5W
• Root Mean Square (RMS): 3W
• Sensitivity: 81dbSPL +/-3db SPL @1m,1W
• Frequency range – Conference mode: 150Hz-8kHz
• Frequency range – Music mode: 150Hz-16kHz

Audio
• Optima HD voice
• Wideband Audio
• Audio duplex
• Noise suppression (NS)
• Digital Signal Processing (DSP)
• Acoustic echo cancellation (AEC)