Glide Gear Leios 3-Axis Brushless Handheld Gimbal Gyro Stabilizer for GoPro and Smartphones Compatible: Apple iPhone 4S, 5, 5S, 6, 6 Plus; Samsung Galaxy Note 2, 3, 4; Samsung Galaxy S3, S4, S5, S6, S6 Edge Three operation modes: Heading Following Mode, Pitch Following Mode and Locking Mode Working voltage: 8.4V