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FreedConn KyPro Helmet Bluetooth Intercom Dervice With Music Sharing

Technical Specifications: External test certification: CE Power supply mode: Built in battery Connection mode: Wire & Bluetooth Plug type: USB Item width: 5.5cm Frequency: 2.4 GHz Weight: 38g Size: 90 X40 x26.5 mm Battery capacity: 500mah Power adapter: DC5V / 1A Charging time: about 1 hour Standby time: 1 week Bluetooth intercom: 9.5 hours Mobile call: 11 hours