Product Description Avantree Sunday Bluetooth solar car kit: With solar charger can connect two mobile phone simultaneously. The Avantree Sunday (BTCK-18N) is a Bluetooth solar car kit. It built-in solar panel harnesses the solar energy to charge it on the go. And it has multi-point function that allows simultaneous connection two phones. Advanced noise and echo cancellation technology can reduces annoying background noise for the caller and removes ambient noise for the driver. Product Features * Integrate a Solar charger, never worry about charging in daylight * Multi-point support connects two phones simultaneously. * Echo cancellation and noise suppression for clearer conversation * No installation required, very easy to use. * Windshield and visor mounting bracket included * Up to 12 hours talk time and up to 800 hours (33 days) of standby time Specification * Bluetooth compliance: Bluetooth V2.1+EDR * Operating frequency band: 2.4GHz-2.48GHz unlicensed ISM band * Operation range: Class 2, 10 meters * Support profiles: HSP and HFP Profiles * Talk time: 10-12 hours * Standby time: Up to 800 hours / 33 days * Battery charging Time: About 3 hours * Charger voltage: DC5.0V, 500mA * Battery: 550mAh, Lithium-lon Battery * Size: 99mm*55mm*17mm * Weight: 70g What’s in the box * Bluetooth solar car kit(Sunday) * USB car charger * Micro USB charging cable * Crystal windscreen holder * Crystal sun visor holder * Sun visor clip * User manual * Warranty card Compatibility Compatible with all of the Bluetooth enable mobile phones. Warranty * 12 months quality warranty for normal use from us directly. Contact Avantree Support for this. Support If have any problem, contact us Mon-Fri 5:30PM-11PM Pacific time. Emails answered within 1 business day.