Black Apple Watch body with built-in battery. Stainless steel Sapphire glass I tried to replace the battery myself and failed. The battery is a new third-party one. Two internal connections are broken. The Apple logo lit up when the battery was installed, but it no longer lights up. Please use it for parts. Stainless steel Sapphire glass - Model: Apple Watch Series 4 40mm - Color: Black - Battery: New third-party built-in battery - Back design: Ceramic back Thank you for looking.