Amazon.com: BoxWave Cable Compatible with Polar M400 (Cable by BoxWave) - Micro USB DuraCable, Braided Micro USB Charging Cable for Polar M400 - Space Grey : Electronics
Amazon.com: Zshion Screen Protector for Polar M430/m400, Full Coverage Ultra-thin Explosion-proof Anti-Scratch Screen Protector for Polar M430/M400 HD Clear (6 Pack) : Cell Phones & Accessories