***** **********Best Quality Guranteed.
*****CSR Bluetooth Chip: It can realize full-duplex intercom with the highest ideal speed of 80km/h-110km/h(50mph-70mph) and the longest distance of 800-1000m (no obstacles). After Bluetooth is connected to the mobile phone, priority switching between phone, intercom and stereo music can be realized. When intercom, it can automatically answer incoming calls, and can automatically resume intercom after hanging up.
*****Noise Cancelling Technology: DSP echo cancellation and noise suppression technology ensures clear voice quality at high speed.
*****Easy Hands-Free Communication: Support to make or receive has-free calls, listen to stereo music, FM radio or use GPS navigation by wireless Bluetooth v 3.0. All functions can be Switched Freely. Also Supply 2.5 mm Audio Socket as wired connection, so you can connect the BT-S3 to cell phone, tablet PC, GPS or other devices which can transfer the music/voice into the earpiece through a 2.5 mm to 3.5 mm audio