Veho bt car speaker and charger kit the saem s3 hands free speaker system is 3 products in 1 firstly when using in a car the saem s3 will allow you to make and receive phone calls hands free preventing accidents and police action the built in ams technology works by detecting human movement in the car so that the saem can automatically power on and off which means that the battery life can be extended way beyond other bluetooth car kits this extends the battery life to 32 hours talk time