Philips HF3531/01 Wake-up Light + FM Radio

Type: wake-up light with an LED reading lamp and night light.
Sunrise simulation: light gradually increases from red through orange to yellow; duration adjustable from 20 to 40 minutes.
Lighting: 20 brightness levels, illuminance up to 300 lux at a distance of 45 centimetres.
Wake-up sounds: 7 built-in options with gradually increasing volume; you can also wake up to FM radio.
Alarm: two independent wake-up times; a tap on the device activates a 9-minute snooze for the sound alarm.
Bedtime: sunset simulation with gradually fading light and nature sounds or FM radio.
Night light: soft orange light, switched on and off by tapping the top of the device twice.
Display: automatic brightness adjustment according to the room’s ambient light.
USB: phone charging port with a 5-volt, 0.5-ampere output.
Power supply: mains-powered via an adapter, 100–240 volts; cable length 1.5 metres.
Dimensions: 19.2 × 19.9 × 14.6 centimetres. Weight: 730 grams.

Compared with HF3532/01: the main difference is that HF3531/01 has FM radio. The other main functions are the same: 7 wake-up sounds, coloured sunrise simulation, a night light, two alarms and USB phone charging.
Compared with HF3521/01: HF3531/01 offers 7 sounds instead of 6, a USB port for charging a phone, and sound that fades together with the light in sunset mode. Both models have FM radio, coloured sunrise simulation, a night light and two alarms.