Battery Capacity: 225mAh (CR2032 button cell)
Bell Frequency Volume: 80dB, 40±1.0kHz
Compatibility: Compatible with Apple devices only
Compatible operating systems: iOS 15.0/iPadOS 15.0/macOS 11 and later
Material: Zinc alloy + PC
Dimensions: 32mm x 8mm ± 1mm
Weight: 10g ± 2g