Sony SRS-XE200 X-Series Wireless Ultra Portable-Bluetooth-Speaker - Blue Condition:Grade A- This is the 40mm band

This is the 40mm band originally from Series 4-6 Apple Watch and is compatible with any series featuring the smaller case sizes of 38mm

- For MagSafe Devices

Easy to apply with a bubble-free installation

- Scratch-resistant skid pads and screen surround

Sony SRS-XE200 X-Series Wireless Ultra Portable-Bluetooth-Speaker - Blue Condition:Grade A- This is the 40mm bandSony SRS XE200 X Series Wireless Ultra Portable Bluetooth Speaker. Blue Version. Features: Lightweight design with an easy to carry strap for maximum portability IP67 waterproof and dustproof paired with a shockproof design Line shaped diffuser distributes music evenly across a wide sound stage X Balanced speakers for powerful bass and crisp sound Dual passive radiators reproduce powerful bass notes Up to 16 hours of playing time, plus quick charging