Length: 9.8 in
Width: 1 in
Height: 8.3 in
Main Unit
1. Open the main unit battery compartment cover (C2).
2. Insert 4 x AA size batteries observing polarity (+ and – marks).
3. Replace the main unit battery compartment cover (C2).
Outdoor Remote Sensor
1. Remove screw from the battery compartment (D3) cover located at
back of outdoor remote sensor.
2. Open battery compartment cover and insert 2 x AAA batteries
observing polarity (+ and—marks).
3. Replace battery compartment cover and screw.
If your clock is not function properly, then we recommend contacting the manufacturer: https://www.marathonwatch.com/pages/contact-us
This clock does not have a back light.
They do not specify.
However it does not appear to be.
Please view the complete instructions here: https://cdn.shopify.com/s/files/1/2581/7358/files/CL030066_UM_EN_20171227_b4c570f6-8d57-4977-b99e-798051fd4d04.pdf?1187
Refer too the owners manual.
No, it allows you too choose display times.
Outdoor Remote Sensor
• 433 MHz RF receiving frequency
• Transmission range: 70 meters/230 feet (open area)
• Low-battery indicator for outdoor remote sensor
• Temperature probe