The Mars MS 204 CROWN is a feature phone known for its long-lasting battery, multiple SIM card support, and built-in features like an FM radio. It is manufactured by Mars Mobile and is primarily available in Bangladesh. 

Key features

• Display: 2.4-inch screen.
• Battery: A large 2500mAh Li-ion battery for extended standby and usage times.
• SIM support: Features dual SIM card slots. A similar model, the MS 204 HERO, supports four SIM cards.
• Connectivity and media:
• Wireless FM Radio: Listen to radio stations without needing a headset.
• Bluetooth: Connect to other devices wirelessly.
• 3.5mm audio jack: Standard port for headphones.
• Photography: Includes a digital camera with a flash.
• Storage: Supports external memory cards for expanding storage.
• Other functions:
• Strong torch: A powerful, built-in LED flashlight.
• Auto call recorder: Automatically records phone calls.
• Crystal keypad and "painting" body: Aesthetically pleasing design elements.
• Privacy settings and blacklist: Tools for managing contacts and blocking unwanted calls.
• Power-saving mode: Extends battery life even further.
• Internet browser: Offers basic internet access. 
• 1 Year Brand Warranty