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Roof Bak4 Zoom Cell Phone Monocular For Travel

China Sichuan Tontube Technology Co.,LTD certification
China Sichuan Tontube Technology Co.,LTD certification
Customer Reviews
Good quality products, trusted supplier!

—— VIctor Osorhan

Outstanding product quality & service! We have worked with a lot of companies in Asia, many times the quality is great but the communication is too complicated. In case of Shifang Yuantong Optical Instrument the quality of the products is excellent AND the communication is outstanding easy and fast

—— Matthias Frisch

8x33 Monocular ED I ordered only one as sample. They shipped fast, had in stock. It is of good quality, very sharp optics, focus smooth and fast.

—— Giorgio Pattarini

Very high quality product! Supplier is attentive, knows the business and is always willing to help. Very pleased with the whole process.

—— Ana Silva

Binocular 8x40 Porro FOV 140m/1000m I ordered one piece as sample, and they shipped promptly from stock. Well made product, very sturdy; the prism are mounted into a cradle inside the housing. The objective is recessed and protected. Focusing wheel is a bit hard but precise; eyepieces are stable. Good optics with green coatings, prisms with black c

—— Milucci Christian

I just wanted to say THANK YOU! :-) ^_^You've always responded to all my questions very promptly and with all the details i asked!You worked with me offering different options when appropriate:shipping options, or neck strap options,or boxes, You've always nice to me! so Thank you!!!

—— Ann Byrne

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Roof Bak4 Zoom Cell Phone Monocular For Travel

Roof Bak4 Zoom Cell Phone Monocular For Travel
Roof Bak4 Zoom Cell Phone Monocular For Travel

Large Image :  Roof Bak4 Zoom Cell Phone Monocular For Travel

Product Details:
Place of Origin: Sichuan, China (Mainland)
Brand Name: Tontube / OEM ODM
Certification: CE, FCC, ROHS
Model Number: YMt4
Payment & Shipping Terms:
Minimum Order Quantity: 1pieces
Price: Negotiation
Packaging Details: 50 pieces/ carton, size: 38X39X52cm, weight 25kg
Delivery Time: 7-30 days
Payment Terms: L/C, D/A, D/P, T/T, Western Union, MoneyGram,Paypal
Supply Ability: 30000 pieces per month
Detailed Product Description
Product Name: Amazon Best Seller Zoom Monocular 10-300x40 Mobile Phone Telescope Lens For Travel Magnification: 10x-300x
Objective Diameter: 40mm Type: Roof Bak4
Keywords: Zoom Monocular 10-300x40 Color: Black
High Light:

Zoom Cell Phone Monocular


Roof Bak4 Cell Phone Monocular


10-300x40 smartphone monocular telescope

Amazon Best Seller Zoom Monocular 10-300x40 Mobile Phone Telescope Lens For Travel



Zoom Monocular Telescopic Feature


1. Full HD multi-coated optics lens with excellent light transmittance and brightness.
2. Environmental protection rubber body, durable as well as good-looking and comfortable hand feeling.
3. The tripod and phone holder can be used with this monocular, making it more stable and easy to observe nature.
4. The objective lens and eyepiece are equipped with dust cover to protect the lenses.
5. The perfect partner for camping, fishing, hiking, concerts, bird watching and traveling etc.



10-300x40 Monocular Description

Compatible with smart phones: The high-magnification monoculars come with a new, fast-aligned samrtphone adapter, which can capture the beauty of the distant world and share it with your family or friends. It is compatible with almost all smartphone brands on the market.

Crystal: zoom monoculars with bak4 prism and 40mm FMC objective lens, waterproof monoculars provide clearer and brighter images, and the enhanced transmittance will reach up to 99.8% of light reflectance, thus achieving clear and clear images, as if It is the same as the porro system.


Monocular with powerful zoom function: 8-24x40 zoom and 10-300x40 monocular with large eyepieces have a better field of view and a wider field of view. A larger objective lens has more light, greater brightness and a wider field of view.


Portable and sturdy: The environmentally friendly rubber and non-slip design based on the camera's appearance principle provide a more comfortable grip.


Suitable for any occasion: 10x-300x variable magnification and dynamic lens focusing system, which can easily zoom in on the target, very suitable for hunting, camping, target shooting, archery, bird watching, watching wildlife, scenery, and even astronomy.

Roof Bak4 Zoom Cell Phone Monocular For Travel 0


Product Specifications

Objective Diameter
Lens Coating
Exit Pupil
Field of View
Focus System
Handwheel Focus
Handwheel Focus
Eyecup System




- zoom Monocular
- Carrying bag
- Cleaning Cloth
- Hand Strap
- Operational manual

- Eyecups for eyepiece and objective lens

- Insert card

- Tripod

- Mobile phone holder



OEM ODM Accessories:

Roof Bak4 Zoom Cell Phone Monocular For Travel 1



Packing & Shipping


We provide comprehensive shipping methods.
* For small quantity orders we ship by DHL, FEDEX, EMS/TNT Express service which is the fastest. Postal ways are also acceptable for small orders.
* For large quantity orders we ship by Air transportation or sea transportation, we can also ship order to buyer’s cargo agent in China.



In stock: in 7 days;

OEM: about 30-60 days after ordering




1. Is your company a manufacturer or trading company?
We are an experienced manufacturer specializing in the production of binoculars, rifle shooting ranges, monoliths, sights, astronomical telescopes, optical instruments, etc., which has a history of more than 15 years.


2. What is your payment method?
The payment methods we usually accept are T / T (bank transfer), Western Union, PayPal and MoneyGram. Your payment method may be tailored to your specific requirements.
We accept different payment methods in different countries.
A 50% deposit is paid in advance, and 50% of the balance is used for transportation. Terms of payment can be negotiated.

3. Does your company provide customized personal services?
YES. OEM / ODM / customization / create your own logo / brand is warmly welcomed!
We can customize or modify our products to meet your requirements.
We can design, innovate, develop and produce new parts according to your specific requirements.

Roof Bak4 Zoom Cell Phone Monocular For Travel 2

Roof Bak4 Zoom Cell Phone Monocular For Travel 3


Contact Details
Sichuan Tontube Technology Co.,LTD

Contact Person: Miss. Allie Nie

Tel: 18215595193

Fax: 86-28-89346527

Send your inquiry directly to us (0 / 3000)