Entel HT446 Submersible Transceiver PMR446 Commercial Grade

HT446 draws upon the pedigree of the award winning HT Series design, offering advanced advanced features combined with commercial grade construction. The HT446 is waterproof, making it ideal for commercial applications where there is a danger of contact with water. Enabled features are accessed by simple menu driven selection, including all CTCSS/DCS tones, built in voice scrambler, voice activation, scanning, vibrate and 20 individual call alert tones. With the latest lithium-lon battery technology memory effects associated with poor charging routines, just a full 24 hour battery life, each and every time you collect your radio from the charger.

Dependable -  The HT446 series utilises state of the art technology with leading edge features, ensuring that it can be depended upon in the most extreme conditions.
Submersible -  At Entel we pride ourselves on engineering our transceivers to the highest specification necessary to protect against the likely hazards encountered in any field of operation. This is why our HT446 series conforms to European Standard IP67 - withstanding total immersion in water to a depth of 1 metre for 30 minutes - giving you total protection and peace of mind.
Commercial Grade Construction -  Meeting MIL STD 810C/D/E rating for tough, enduring performance, the HT446 series conforms to stringent standards, enabling it to withstand the every day rigours of shock, vibration and the corrosive action of dust and moisture, ensuring many years of trouble free use in a salt water environment.
Ergonomic -  Large rubber armoured volume control and side grips make the HT446 series easy to grip with wet or gloved hands, and have indispensable high visibility displays.
Built for hostile environments -  HT446 radios are unique in offering such a full specification.They are built without compromise to deliver superb, consistent performance in the most hostile environments encountered on land or at sea.
Feature Rich - Simple To Use! - With all its technological advances the HT446 series remains very simple to use, with the majority of its features accessed by a single key depression.
Superior Audio Quality -  Latest compander noise reduction technology delivers loud and crisp audio no matter what environment you are in.
Battery Life Indicator -  Continually monitors battery state for your safety and convenience.
Lithium-Ion Battery Technology -  This very latest battery technology gives you three big advantages: 1. Huge fourteen hour duty cycle with supplied CNB640E battery pack. 2. Not prone to the dreaded memory effect that Nicad and Ni-MH battery packs suffer from, therefore no more need to fully discharge your battery pack before charging! 3. Stores a charge up to three times longer than a Nicad.
VOX -  Hands free operation when used with a VOX accessory.
Programmable buttons -  Four dealer programmable buttons allow you to instantly select any of the unique features available from HT446 series.
Three Year Warranty -  The HT446 series transceivers are supported by a three year manufacturer's warranty

Specification

Output power 0.5W erp
Modulation type FM
Duty cycle 24 Hours (5/5/90)
Maximum deviation 2.5KHz
Harmonic distortion <3%
Frequency stability 2.5ppm
Audio output 8Ohms
Hum and noise -40dB
Spurious emissions -36dBm <1GHz -30dBm >1GHz
Audio distortion 3%
Sensitivity <0.25uV for 12dB sinad
Squelch threshold 0.25uV typical
Selectivity 68dB
Spurious response 77dB
Intermodulation 70dB
Blocking 70dB
If frequencies 21.4MHz
Operating temperature -20 to +55 deg C
Approvals EN 300 296
Frequency range 446.00625 to 446.09375
Channel capacity 8
Operating voltage 7.4
Dimensions (mm) 130 x 59 x 33
Weight 296g
Battery voltage 7.4V Lithium-ion rechargeable battery 

Related Article:
http://www.446user.co.uk/review_44.html