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Warranty Period
12 Month(s)

BTU Calculator

i Height to the celling of the location where the air conditioner to be installed
i Width of the location where the air conditioner to be installed
i Length of the location where the air conditioner to be installed
i Maximum number of occupancy
i Total Area of the concrete slab in sq. ft.
i Total Wattage of heat dissipating equipment like, ex: Bulbs/ Batteries/ UPS/ IT equipment/ Heaters etc.
Why it’s important to get your BTU Calculation right

Please ensure to enter the correct room dimensions and number of room occupants into the BTU calculator, to choose the optimum capacity Air-Conditioner required for the room.

Warning:Choosing the wrong Air Conditioner with capacity requirement may result in higher energy costs for the customer and shorten the life of the Air-Conditioner. Therefore buyabans.com will NOT proceed with the installation.

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OPPO W51 Headphone - Blue


Easy payment plans available upto 60 months

Starting from Rs.720

Sampath Bank Payment Plans

Plans (Month) Handling Fee (%) Instalments Total
6 0% Rs.2,809 Rs.16,856
12 0% Rs.1,405 Rs.16,856
20 0% Rs.843 Rs.16,856
24 2.5% Rs.720 Rs.17,277
Starting from Rs.1,405

Seylan Bank Payment Plans

Plans (Month) Handling Fee (%) Instalments Total
12 0% (Call & Convert) Rs.1,405 Rs.16,856
Starting from Rs.755

LOLC Bank Payment Plans

Plans (Month) Handling Fee (%) Instalments Total
6 5% (Call & Convert) Rs.2,950 Rs.17,699
12 5% (Call & Convert) Rs.1,475 Rs.17,699
24 7.5% (Call & Convert) Rs.755 Rs.18,120
Starting from Rs.702

Hatton National Bank (HNB) Payment Plans

Plans (Month) Handling Fee (%) Instalments Total
24 0% (Call & Convert) Rs.702 Rs.16,856
koko payment
Starting from Rs.5,619

Koko Pay Payment Plans

Plans (Month) Handling Fee (%) Instalments Total
3 0% Rs.5,619 Rs.16,856

OPPO Enco W51 True Wireless Headphones

Noise off. World on.

Dual Technology for Both Crystal-Clear Music and Calls
The W51 headphones have achieved a unique breakthrough in noise reduction for both music and calls. By coordinating a total of 6 microphones with a deep noise reduction algorithm, your wireless earphone experience will never be the same.
 Watch Video
In-Depth Noise Reduction for an Immersive Experience
The W51 come equipped with a new dual-core digital noise reduction chip and more advanced hybrid noise reduction microphones. They are intelligently optimized to detect and reduce every day noises1, such as from subways and trains. With a noise reduction depth of 35 dB2, you get an undisturbed listening experience.
Triple Microphone Noise Reduction for Clear and Carefree Calls
Each earphone comes equipped with triple microphone noise reduction technology and redesigned air ducts to prevent noises of wind. Whether you are in the subway, on the bus, or riding your bike, even a single earphone will capture your voice clearly.
Be Free with Wireless Charging
OPPO's first true wireless headphones that support Qi wireless charging. Charge the earphone box wirelessly3 by simply putting it on a charging mat and let the music flow.
*The W51 headphones do not come with a charging mat.
New Quality Compensation for Professional Audio Performance
OPPO’s first true wireless headphones to be equipped with a system-wide audio quality compensation algorithm to avoid loss of audio quality from noise reduction techniques. The W51 offer quality restoration of the audio for clean, uncompromised audio performance. Additionally, the headphones are equipped with Dual TPU composite graphene diaphragms to provide enhanced audio response and treble performance.
Bluetooth 5.0 Provides a Fast, Stable, and Smooth Experience
The W51 headphones are powered by Bluetooth 5.0 technology for faster and more stable audio transmission when faced with multiple sources of interference. They provide stable connection at up to 10 meters away for smooth music and calls even when your phone is not nearby.
Binaural Low-Latency Bluetooth® Transmission for Lag-Free Transmission
The W51 adopt the newest Bluetooth low-latency binaural transmission standard to greatly reduce any audio delay. This significantly improves audio-to-video synchronization, making audio lag and signal interference no longer an issue for your music and video experience.

Compatible with Android / iOS4

Supports both single and double headphones

Innovative Design That Reflects 
Model ETI21
Product colors Floral White / Starry Blue
Model (charging case) ETI22
Driver 7mm dynamic driver
Driver sensitivity 103dB @1KHz
Frequency response range 20Hz ~ 20kHz
Microphone sensitivity -38 dBV/Pa
Bluetooth version BT 5.0
Wireless range 10 m
Battery type Rechargeable lithium-ion battery
Battery capacity 25 mAh (headphones) /
  480 mAh (charging case)
Music play time (50% volume) ANC on: 3.5h (single charge) / 20h (with charging case)
  ANC off:4h (single charge) / 24h (with charging case)
Wired Charging time 80min (with charging case)
Wireless charging time 2.5h (with charging case)
Charging port USB Type-C
Dust and water resistance (headphones) IP54
Weight (Entire device) 55.5g
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