... Feature: 1), Bluetooth V2.1+EDR 2), Small and Light (less than 9g) fashion design 3), Also ... Built-in Chip Antenna for better sound quality 5), Friendly interface for faster connection 6), Operating range ... Standby time: ≥ 50 hrs 4), Working range: 10M 5), Frequency range: 2.4-2.48GHz 6), Charging time: ... 8), Talk time: ≥ 3 hrs 9), Weight: 9 g 10), Size: 32*16*9.5 mm 11), Housing Color: Black and ...