L.arm is a smart wristband that is connected to a sensor placed on the entrance door. When someone knocks on the door the sensor sends a signal and the wristband device starts vibrating. It effects two more senses above sound: sight and touch (LED light + vibrating). The devices communicate via Bluetooth.
Different colors
Different types of straps: metal, leather and silicone.
Placed close to a smoke alarm. Beside its doorbell function the sensor communicates danger as well.
L.Arm is rechargable.
