The RG503 Handheld Game Console offers a high-quality gaming experience with its feature-rich design. Here's a summary of its key features in English:

**Key Features:**

- **Crystal-Clear Display:** Enjoy gaming on a 4.95-inch OLED full view screen with a sharp 960x544 resolution. The screen is protected by double-protected tempered glass, ensuring resistance to scratches and drops while providing better eye protection.

- **Long Battery Life:** With a powerful 3500mAh lithium battery, you can continuously play games for up to 8 hours. The battery supports fast charging via a USB cable and offers an extended standby time, making it ideal for long journeys or travels.

- **Extensive Game Support:** This video game console supports over 20 different game formats, including PSP, DC, SS, NDS, N64, PS1, CPS1, CPS2, FBA, NEOGEO, GBA, GBC, GB, SFC, FC, MD, SMS, GG, MSX, PCE, and WSC. It comes with a pre-installed 64GB Mirco SD card containing over 4193 games, and you can add more games up to 256GB. It also allows you to download games in relevant formats according to your preference.

- **Powerful Processing:** The console is powered by the RK3566 Quad-Core 64-bit Cortex-A55 processor with a main frequency of up to 1.8GHz. This hardware ensures smooth gameplay, even for complex games with no frame loss.

- **Connectivity and Features:** The console supports 5G WIFI 802.11a/b/g/n/ac, Bluetooth 4.2, and offers multilanguage support. It includes a 3.5mm earphone jack and high-quality double-horn stereo speakers. You can customize your gaming experience by adding your preferred emulators and games, avoiding repeated games.

**Specifications:**

- **Color:** Available in Blue, Bronze, Grey, and Black.

- **Screen:** Samsung 4.95-inch OLED full view screen with a resolution of 960x544.

- **CPU:** Quad-Core 64-bit Cortex-A55, with a main frequency of up to 1.8GHz.

- **RAM:** LPDDR4 1GB.

- **Memory:** 16GB.

- **WIFI/Bluetooth:** 2.4/5G WIFI 802.11a/b/g/n, Bluetooth 4.2.

- **Function:** LINUX System.

- **Games:** Supports various game formats, including PSP, N64, DC, SS, PS1, CPS1, CPS2, FBA, NEOGEO, GBA, GBC, GB, and more.

- **Network Multimedia:** Features multimedia support with Kodi for music, video, and TV.

- **Battery:** Equipped with a Li-polymer 3500mAh battery, offering up to 6 hours of gameplay.

- **TF Card:** Supports TF cards up to 512GB.

- **Additional Features:** Supports built-in WIFI online fighting, streaming, HDMI output, energy-saving settings, display brightness adjustments and more.

**Accessories:** The package includes a USB charging cable, gift box, user manual, and a screen protector.

The RG503 Handheld Game Console delivers a rich gaming experience with its large and clear OLED screen, powerful hardware, extensive game library support, and convenient features.