It's a sort of Do Not Disturb feature that prevents unwanted distractions while riding a bike. The feature is enabled using the included NFC tag and will handle incoming calls.
Normally, the Galaxy J3 won't show any notifications so as not to disturb the rider. It will play a message, explaining that the phone's owner is riding a bike and can't answer. If it's an emergency, the caller can press 1 and the call will go through.
You still can't answer the call - Motion Lock makes sure you're completely stationary before the phone lets you answer.
Anyway, the Samsung Galaxy J3 (2016) features a 5" Super AMOLED screen (720p), quad-core processor with 1.5GB of RAM, LTE and dual-SIM connectivity, plus a 2,600mAh battery. The phone has two cameras - 8MP/1080p on the back and 5MP on the front.
The J3 is available right now for INR 9,000 ($135/€120).