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