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CMF by Nothing Buds 2 vs Sony WH-CH520 vs Sony WH-CH720N

cshadmin

- Updated: 19th Nov 2025, 17:39 IST

Key Feature Comparison

At a Glance

Show differences only

20000 Hz

20 Hz

20000 Hz

7 Hz

460 mAh

55 Hours

35 Hours

Wireless

In Ear Canalphone, In the Ear

Wireless

On Ear, Over the Head

Wireless

Over Ear, Over the Head

10 meter

Auto Pairing

10 meter

Auto Pairing

10 meter

Auto Pairing

Detailed Specs

General

Brand

CMF

Sony

Model

Buds 2

WH-CH520

WH-CH720N

Price

Rs. 2,699

Rs. 4,490

Rs. 9,990

Price Status

Confirmed

Market Status

Available

Compatible Devices

Mobile Phone, PC, Tablet

Box Contents

Earbuds, Charging Case, USB Cable Type C, User Manual, Warranty Card

Headband

Headphones, USB Type-C charging cable, 3.5mm audio cable

Warranty

1 Year

Launch Date

12-Apr-23

9-Mar-23

Design

Type

Wireless

Design

In Ear Canalphone

On Ear

Over Ear

Fit

In the Ear

Over the Head

Open or Closed Back

Closed Back

Water Resistant

Yes, IP55 rating

Performance

Driver Type

Dynamic Driver

Max Frequency Response

20000 Hz

Min Frequency Response

20 Hz

7 Hz

Physical Design

Eartip Size

Large, Medium, Small

Large

Weight

51 gm

147 gm

192 gm

Dimensions

Eartips :33.4 x 22.8 x 20.6 mm Carrying case :53.3 x 53.3 x 23 mm

Overall :237.9 x 104.1 x 119.1 mm

208 x 55 x 26 mm

Colours

Orange, Light Green, Dark Grey

Black, Blue, White, Beige

Black, Blue, White

Features

Noise Reduction

Yes

Noise Cancellation

Yes

Replaceable Earbuds

Yes

Call Control

Answer / End

Music Control

Volume Control

Other Control

Volume up/down; on/off

Voice Assistant

Yes, Siri/OK Google

Connectivity

Bluetooth

Bluetooth Version

5.4

5.2

Bluetooth Profile

A2DP, AVRCP, HFP

A2DP, AVRCP, HFP, HSP

Bluetooth Range

10 meter

Bluetooth Features

Auto Pairing

Microphone

Yes

Battery

Battery Capacity

460 mAh

Playback Time

55 Hours

35 Hours

Charging Type

USB Type-C

USB

Charging Time

93 Minute

3 Hours

3.5 Hours

Battery Type

Li-ion

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