Features:1. Made of aluminum alloy, it's been through CNC anodizing, so the structure is strong and durable; the paint performs well in terms of the corrosion stability, durable to use; also comes with the good looks.2. It compatible for gopro3.3 + .4.5, for Xiaoyi, and for SJCAM3. The battery life: about 2.5-3Hours voltage Minimum 6.5V Standard 7.4V Maximum 8.4V RemarksAction range of angle of pitch -160 degrees (down) 0 (horizontal) +160 degrees (up) Vertical handheldAction range of roll angle -50 degrees 0 (horizontal) +50 degrees Vertical handheldAction range of course angle -160 degrees (to the left) 0 (horizontal) +160 degrees ( to the right) Vertical handheldAction range of course angle -50 degrees (to the left) 0 +50 degrees ( to the right) level handheldSpeed of pitch follow-up 30 degrees / sec uniform velocity followSpeed of course tracking 120 degrees / sec uniform velocity followFollowing precision of static posture 0.01 degree The holder is staticFollowing precision of moving posture 0.02 degree Motor overload<2GMotor overload protection current: 1AWeight: about 265g (without battery and camera)Modes supported: Semi following: following the heading axis, self-stabilization of the pitch / rollAll following: following the heading axis and the pitch axis, self-stabilization of the roll axis (power on default mode)Full lock: full lock for the roll, the pitch, and the heading axes, and the pitch axis can be pulled to lockInverted: supportTheoretic battery life: about 2.5-3Hours Packing list:Packing box * 1Battery * 1Manual * 1, Stabilizer * 1