small packet big surprisenice offering from mivi in this space a compact bt speaker with 20hrs battery backup is quite good i am using it since yesterday and yet to charge itbattery is performing really well its dust and waterproof capability makes it an awesome companion outdoors bt 50 helps with connectivity after initial niggle its connecting flawless sound will surprise you the most in this small footprint its small but loud and clear you can use it for your calls alsomi