WHO, WHAT, WEARABLE Martian Electra E10 Predictably, wearable devices known as “notifiers” do just that—notify their user (usually with a light or a vibration) when they’re receiving calls, emails, and texts. Yet some connected devices can actually stand in for smartphones on occasion. Martian’s sporty-chic Electra E10 smartwatch still has to be tethered via Bluetooth to a phone—but its innovative voice functionality leaves you hands-free far more often.  What we liked: We appreciated the simple convenience of being able to make, accept, and conduct phone calls from o