Vivo S15 Pro 
I'm sorry, but there is no information available about a Vivo S15 Pro. It is possible that you might be referring to the Vivo S1 Pro or the Vivo V15 Pro. Here are their specifications:
Vivo S1 Pro:
Display:
- 6.38-inch Full HD+ (1080 x 2340 pixels) Super AMOLED display
Processor:
- Qualcomm Snapdragon 665 chipset
Memory and Storage:
- 8GB of RAM
- 128GB of internal storage
- Expandable storage up to 256GB via microSD card
Cameras:
- Quad rear camera setup:
- 48-megapixel primary sensor
- 8-megapixel ultra-wide-angle sensor
- 2-megapixel depth sensor
- 2-megapixel macro sensor
- 32-megapixel front-facing camera
Battery:
- 4,500mAh battery with support for 18W fast charging
Other features:
- In-display fingerprint sensor
- Wi-Fi, Bluetooth 5.0, GPS, FM Radio
- Dual-SIM (Nano)
- Android 9.0-based Funtouch OS 9.2
Vivo V15 Pro:
Display:
- 6.39-inch Full HD+ (1080 x 2316 pixels) Super AMOLED display
Processor:
- Qualcomm Snapdragon 675 chipset
Memory and Storage:
- 6GB of RAM
- 128GB of internal storage
- Expandable storage up to 256GB via microSD card
Cameras:
- Triple rear camera setup:
- 48-megapixel primary sensor
- 8-megapixel ultra-wide-angle sensor
- 5-megapixel depth sensor
- 32-megapixel pop-up front-facing camera
Battery:
- 3,700mAh battery with support for 18W fast charging
Other features:
- In-display fingerprint sensor
- Wi-Fi, Bluetooth 5.0, GPS, FM Radio
- Dual-SIM (Nano)
- Android 9.0-based Funtouch OS 9.0