- Redmi Note 9 - RAM: 4 GB/6 GB ; Storage: 64 GB/128 GB
- Redmi Note 9 Pro - RAM: 6 GB/8 GB ; Storage: 64 GB/128 GB
Kamera belakang (4 kamera)
- Redmi Note 9 - 48 MP (f/1.79, wide, PDAF) ; 8 MP (f/2.2, ultrawide) ; 2 MP (f/2.4, macro, AF) ; 2 MP (f/2.4, depth sensor)
- Redmi Note 9 Pro - 64 MP (f/1.89, wide, PDAF) ; 8 MP (f/2.2, ultrawide) ; 5 MP (f/2.4, macro, AF) ; 2 MP (f/2.4, depth sensor)
Kamera depan
- Redmi Note 9 - 13 MP (f/2.25)
- Redmi Note 9 Pro - 16 MP (f/2.5, wide)
Baterai
- Redmi Note 9 - 5.020 mAh (fast charging 18W)
- Redmi Note 9 Pro - 5.020 mAh (fast charging 30W)
SIM dan konektor
- Redmi Note 9 - Dual-SIM (nano), micro-SD slot (hingga 512 GB), 3.5mm headphone jack, USB Type-C
- Redmi Note 9 Pro - Dual-SIM (nano), micro-SD slot (hingga 512 GB), 3.5mm headphone jack, USB Type-C
Biometrik
- Redmi Note 9 - Fingerint sensor (di belakang), Face Unlock
- Redmi Note 9 Pro - Fingerprint sensor (di tombol power), Face Unlock
Fitur pendukung
- Redmi Note 9 - Android 10, MIUI 11, IR blaster, Bluetooth 5.0, Wi-Fi 802.11 a/b/g/n/ac
- Redmi Note 9 Pro - Android 10, MIUI 11, IR blaster, Bluetooth 5.0, Wi-Fi 802.11 a/b/g/n/ac, NFC
Warna
- Redmi Note 9 - Midnight Grey, Forest Green, Polar White