Uses 3.5mm audio jack, no bluetooth pairing or batteries required. Just plug in and snap with the physical shutter button. Sandblasted aluminium rod with 6 extension sections ; Extends upto 70cm 260 degree rotatable head design for different angled shots Compatible with all Redmi phones, Mi Phones andmost Android phones running version 4.2.2 and above High-quality anti-slip handle ; Lightweight and durable