Flash Receiver

I have a basic bellman clock with bed shaker my question which device for hearing the fire alarm I live in a apartment

Hello. We recommend you to look into this Smoke/Fire Safety Notification Pacakge https://shop.bellman.com/collections/alerting-devices-safe-smoke-carbon-monoxide-detector-for-deaf/products/alerting-signaling-devices-smoke-fire-alarm-system-smokeclockbedshaker . This pakcage includes a Smoke Alarm Transmitter, a Alarm Clock Receiver and a Bed Shaker. The Smoke Alarm Transmitter is to detect heat and smoke at the earliest possible stages. When activated, the transmitter will immediately send a radio signal wirelessly to the Alarm Clock Receiver, and you will be alerted with loud sounds, bright flashing lights, and intensive vibrations from the bed shaker. 
Hope this information helps. 
Best regards,
Bellman & Symfon

Can the flash receiver wake you up if you are sleeping? Are the flashing strobes strong enough to wake a sleeping person?

The Flash Receiver does have a bright light that can light up the room, but in the case of being woken up by the flashing light by itself it may vary from person to person.

If you would like to be notified about a certain event happening in your home while you are sleeping while using the Flash Receiver, we recommend using the Bed Shaker accessory.

The Bed Shaker can be connected to the Flash Receiver and placed under your pillow or your mattress. Whenever the Flash Receiver is triggered by one of the Bellman & Symfon Transmitters. The Flash Receiver will notify you with bright flashes and the Bed Shaker with notifiy you with vibrations.

Do you have fire alarms with strobe or do Ii need a flash receiver in each room? Can the flash receiver be attached to a wall or ceiling?

Our Smoke Alarm Transmitters do not have a strobe light on them. You will need to have Flash Receivers in the rooms that you would like to have the flashing light notification for smoke or fire in the home. 

For the second question, Yes, you can purchase the Wall Bracket for the Flash Receiver to be able to mount the Flash Receiver onto a wall if needed.