SUNITEC SERVICE - Up to 22 hrs of talk time, 1000 hrs of standby time & about 2 hours to fully charge. All bluetooth car adapter from our company enjoy the lifetime after-sale service. We firmly believe you'll love our bluetooth receiver for car, and if you aren't absolutely satisfied, return them within 60 days for a refund, no questions asked. EASY TO USE - Just clip this car bluetooth speakerphone onto the visor. SUNITEC BC980SA car stereo with bluetooth speakerphone is specially designed for safe driving which is mainly used for handsfree talking on the road, but also can serve as a speaker on the conference table or a portable music player which supports switching. It's a wonderful fathers day gifts. INTELLIGENT CONTROL - The motion sensor enabled BC980SA allows you to turn your bluetooth car speaker to auto power on, so the device turns itself on when your car door opens and off when the bluetooth disconnects. This visor handsfree bluetooth car speaker can connect 2 bluetooth cell phones simultaneously on working & easily switch between music & calls!. SAFE DRIVING - This bluetooth hands free car kit supports Siri Voice Assistant, you can make phone calls, send texts or get driving directions from GPS applications, you will also hear voice guidance during use, improved oversized keys for worry-free operation, so you can stay fully focused on driving. PREMIUM QUALITY AUDIO - Our upgraded hands free bluetooth for cell phone particularly designed for pretty sound with Bluetooth V5.0+EDR, HD voice, noise cancellation technology and stereo speaker while other products in the market adopt Bluetooth 5.0, you can enjoy your crystal clear calling and music no matter where you are!.