The Vertex C311 mobile phone is a convenient model with an extended screen, specially designed for the elderly. It has a bright colored body with a soft-touch coating, which gives it a matte effect that is pleasant to the touch. The device is equipped with oversized keys that have audible typing to ensure ease of use for visually impaired people. The bright display and loud speaker make using the phone as comfortable as possible for the elderly.

The Vertex C311 phone also offers several additional features that make it an ideal choice for senior citizens. It is equipped with a speed dial feature that provides quick access to the desired numbers. In addition, there is an SOS button on the back of the phone for emergencies.

The phone also has a flashlight function, which is turned on by a separate side key, which can be useful in situations where lighting is needed.

Vertex C311 supports two SIM-cards, which allows you to stay in touch with several numbers at the same time. It is also equipped with a 0.3 MP camera for taking simple pictures and a radio function for listening to radio stations.

Here are the detailed specifications of the Vertex C311 phone:

- Wireless interfaces: Bluetooth
- Number of SIM cards: 2 SIM
- Processor: MediaTek MT6261
- Body type: classic
- Body material: plastic
- Weight: 93 g
- Dimensions (WxHxD): 58.5x123x12.5mm
- Display: 2", SD, color screen, 141 PPI
- Camera functions: no flash, main camera, 1 main camera 0.3 MP
- Headphone output: mini jack 3.5 mm
- Wireless interfaces: Bluetooth 2.0
- NFC support: no
- Processor: MediaTek MT6261
- Built-in memory: 32 MB
- Slot for memory cards: yes
- Battery capacity: 1400 mAh
- Standby time: 400 hours
- Type of connector for charging: micro-USB
- Features: FM radio, functions for the elderly, flashlight
- Package contents: phone, docking station, charger, battery
- Dimensions of transport packaging: 18x6x12 cm
- Weight in transport package: 0.4 kg

The Vertex C311 phone offers all the basic functions for receiving calls and sending SMS, as well as some additional features that make it convenient for the elderly.