Bluetooth 2.1. Handsfree profile 1.5. Bluetooth pendant: 1.5” x 1.5”. Width: 0.5". Necklace length: 26”. 4 hours talk time. Up to 100 hours standby. DSP technology filters background noise. Charges via micro USB interface. Do not expose to temperatures above 113°F or below 14°F. Keep dry.
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