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Full-duplex hands-free unit
With Snom HD-Voice, voices are transmitted in crystal-clear quality through the high-quality speaker and integrated microphone.

Snom HD-Voice
Thanks to the G.722 broadband codec, calls can be made in crystal-clear HD-Voice quality.

Up to 12 hours talk time
The integrated battery in the C52-SP enables talk time of up to 12 hours

Up to 70 hours standby
The C52-SP comes with a battery charge of up to 70 hours standby time or can be operated with the power supply unit provided.

Wireless integration
o increase speaker and microphone range significantly, even in larger rooms or conferences involving large numbers of people, up to three C52-SP units can be used simultaneously with a C520 - WiMi conference telephone. The C52-SP hands-free units are wirelessly connected to the C520 – WiMi and can operate at a range of up to 50 metres.

Investment security
With the C52-SP, Snom conference solutions based on the C520 - WiMi can be adapted both to expanding numbers of attendees in teleconferences and to larger-size meeting rooms. The wireless conference solution grows flexibly with your business, as existing equipment and infrastructure do not need to be replaced.


C520-WiMi expansion unit for large conference rooms

• Extensive operating range thanks to the DECT technology
• Flexible positioning thanks to the battery power supply and DECT technology
• Up to 3 C52-SP can be used at the same time for every C520-WiMi
• Call handling and volume buttons placed on the C52-SP
• Multicolour status LEDs

Specifications Installation

• DECT coupling via the C520-WiMi
• No additional equipment required 

• Dimensions (ca.): 305 x 305 x 61 mm (LxWxH)
• Weight (ca.): unit 1.1 kg
• Input voltage: 12V DC (SELV)
• Power supply: Batteries or 12V DC power adapter  (included)
• up to 70 hours battery life in stand-by
• up to 12 hours talk time
• DECT connectivity (up to 3 for every C520-WiMi)
• Call handling and volume buttons
• LED status light (call, mute, etc.)
• Environmental conditions:
• Operating temperature: from -5°C to 45°C
• Non-operating temperature: from -5°C to 60°C
• Humidity: up to 95% (non-condensing)
• Included in the package:
• C52-SP
• Battery for the C52-SP
• Cable
• Quick start guide (QIG)
• Colour: Black
• Manufacturer’s warranty: 2 years
• Product code: 00004357


CE Marking

IEC 60950 safety


• Up to three C52-SP units can be connected to a single C520-WiMi at the same time.

• To operate, the C52-SP needs a C520-WiMi and is not compatible with other DECT based devices.(1)

(1) Compatible with C520-WiMi (product code 00004356)

Instruction Manual


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