PLEASE, READ CAREFULLY EVERYTHING. IT IS IMPORTANT.

About Item: DEM-4M (ДЭМ-4M) - Electromagnetic differential microphone.

New, have never been used.

Manufacturer: RUSSIA

ДЭМ-4M microphones are designed to provide reliable communication (speakerphone) and broadcast service or ДЭМ-4M microphones are designed to provide reliable communication (speakerphone) and broadcast service or broadcast transmissions at various facilities with a fairly high level of different dustiness and a high level of humidity, in conditions of fairly strong extraneous noise. This indicates the high reliability of the presented products, capable of working smoothly in the most extreme conditions.

Technical characteristics of the cap ДЭМ-4M

The cap ДЭМ-4M is a very reliable microphone designed to work in various communication equipment at temperatures from -10 ° C to + 45 ° C.

ДЭМ-4M has a hermetic, not collapsible design and a long service life of up to 50,000 hours.

The frequency range of the DEM4M - from 150 to 3400 Hz

Electrical resistance (nominal) - (50-600) Ohm

Return in the range of frequencies (average) - (5.5–28) Pa

Application area:

- this cap is used in telephones of general application;

- in ship and other special, military communications and sound reinforcement equipment.

Weight: ~110 grams.


PLEASE, READ CAREFULLY!

SHIPPING METHODS:

1. Europe - Economy International Shipping - no tracking number.
If you wish faster delivery and tracking number, please select STANDARD International Shipping.
2. Worldwide - Standard International Shipping - with tracking number included in the cost of shipping.
3. Any order above $ 60 US - with tracking number included in the cost of shipping.

The delivery time varies from 7 to 45 working days (9 weeks) to most of the countries.

Detailed info you can find in the table below.

Delivery time
% of shipments that arrive in the said delivery time
Country working days (without holidays and weekends)
<15 15-24 25-34 35-45 >45
<3 weeks 5 weeks 7 weeks 9 weeks >9 weeks
Canada, United States 5 % 85 % 7 % 3 % 0 %
Africa, South America 5 % 20 % 55 % 20 % 0 %
Japan, South Korea 10 % 85 % 5 % 0 % 0 %
Taiwan, Thailand 5 % 45 % 45 % 5 % 0 %
China, India 5 % 40 % 50 % 5 % 0 %
Indonesia, New Zealand 5 % 40 % 50 % 5 % 0 %
Israel 5 % 65 % 30 % 0 % 0 %
Australia 5 % 55 % 35 % 5 % 0 %
Russia 5 % 50 % 40 % 5 % 0 %
Europe 60 % 35 % 5 % 0 % 0 %
Others, not entered shall, countries 5 % 20 % 55 % 20 % 0 %
Items are generally shipped out within 24 (rarely 48) hours after payment has been confirmed (Holidays, Sat. & Sun. excluded). The delivery time depends on the destination, holidays, customs clearance factor and other factors.
Please, if you have a problem, DO NOT OPEN CASE on eBay before this period has elapsed or before you communicate with us.
We ship your package to your eBay address. Please update your complete address including full name and phone number during checkout. We are not responsible for any wrong or undeliverable address.
INTERNATIONAL BUYERS – PLEASE NOTE: Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer’s responsibility. Please check with your country’s customs office to determine what these additional costs will be prior to bidding/buying.
ADDITIONAL INFORMATION & QUESTIONS: The pictures are for general information only. They do not carry technical information. I apply maximum efforts to work better and better. It is very important for me to get your feedback to know, whether you are really satisfied completely! Please, contact us if you have questions - especislly in the delivery term. Please use the link "Ask seller a question".
GUARANTEES & a POLICY of RETURN: We guarantee you complete satisfaction with all our products. If you receive an item you ordered damaged or defective, we will send replacement item. We only accept returns if the items in original package you have received are not what was described in the auction, damaged or defective. If exchange is not possible money refund will be issued. All returns must be sent to Bulgaria. Item for returning must have the original tags and packing, otherwise it won't be accepted.

Thanks And Good luck!