This bluetooth hands-free car kit is very esay to installation - just clip it on your sun visor! It is compact yet feature rich， with full automatic pairing.It can connect with two phones at the same time，And very easy to use. Features:★100% Brand new and high quality ★Simply clip on your car's visor ★Connect with two mobile phones simultaneously，can work with most phones，like iPhone5 4 4S Samsung Galaxy S3 i9300 HTC Blackberry... ★Bluetooth: Version 2.0， Class 2， 10M ★the working frequency range: ISM band (2.4 ~ 2.48GHZ) ★Wireless connections up to 10 meters range ★support Hands-Free， Headset Bluetooth protocol specifications and other ★equipped with hi-2W speakers， and high-sensitivity microphone ★Battery type: Lithium-Ion battery， 3.7v， 650mah (BL-5B) ★Standby time: up to 120 hours How to use:Connect this device with lamp or home appliance or electric circuit， then rotate the knob for dimming， speed， voltage， temperature control. Package include:1 x Bluetooth speaker 1 x Car Charger Adapter 1 x Sun Visor Clip 1 x Cable 1 x Battery