细节：
锌合金双耳/胸部，
双面胸片，
轮廓软耳技巧，
配件包，
提供不同的颜色，
质量保证，
欢迎OEM服务，
ISO，CE证书。

Details:
Zinc Alloy Binaural/Chest Piece,
Dual-side Chest Piece,
Contoured Soft Ear Tips,
Accessory Package,
Different colors are available,
Quality assurance,
OEM services are welcomed,
ISO, CE certificates.