This Bluetooth headset operates in 2 modes, master mode and slave mode. In master mode, SH-320 transmits and receives audio data simultaneously. In slave mode, SH-320 basically receives audio data and can transmit at the same time when user uses a speaking function.

• 4-channelled operation.
• 2-way simultaneous audio/voice communication.
• Small and light in weight (about 36.5g).
• Volume up/down button and multi-function button.
• Power requirement: 5V DC 800mA.
• Battery type : lithium polymer.
• Charging time: 2 hours.