This rugged telephone handset is the first military-grade model developed by SINIWO, drawing inspiration from the H250 handset. As an actual manufacturer and factory based in China with our own R&D team, we possess the capability to design and customize rugged telephone handsets under the SINIWO brand. We deliver products with competitive pricing and assured quality, empowering our clients to succeed in the market.
This rugged telephone handset from SINIWO is designed in compliance with the MIL-standard H250 specification, which is commonly used in military communication equipment such as radios, MIL-spec telephones, and police call systems.For customers who are drawn to the robust design of this handset but do not require full military-standard specifications, SINIWO also offers matching microphones and speakers at a more affordable price.
| Model No. | H-250 | A25 |
| Weight | Approximately 350g | Approximately 350g |
| Ambient Noise | N/A | ≤100dB |
| Speaker impedance | 1000Ω (@1kHz) | 1000Ω (@1kHz) |
| Microphone impedance: | 150Ω (@1kHz) | 150Ω (@1kHz) |
| Microphone output level: | More than -56dB(@1kHz) | -59dB(@1kHz) |
| Distortion: | Less than 5%(300Hz~3500Hz) | Less than 5%(200Hz~4000Hz) |
| Operating temperature range | -20℃~65℃ | -45℃~55℃ |
| Water resistance: | Remains fully function after submerged in 3 feet (91cm) of water for 2 hours | Remains fully function after submerged in 1 meter of water for 2 hours |
| PTT switch durability: | More than 2 million actuations | More than 2 million actuations |
This rugged telephone handset is mainly designed for military use, so corrosion resistance grade and waterproof grade are the most important factors to think about. So we manufacture this handset with waterproof sound passing membrane on both microphone and speaker and seal all the space by waterproof glue.
When we design this rugged telephone handset for military environment, we chose RoHS approved fiber reinforced polycarbonate material to strength the rugged feature. For clients who have interest in this rugged telephone handset in industrial filed, we offer matched choice to meet clients demand.
For this Rugged telephone handset used in military environment, another important thing is noise reducing from the background. Both the front and the back of the microphone have sound input holes. Since the position of the front and the back are opposite, noise is input into both sides, which will cancel each other. The audio will not be canceled since it is only input into the speaking side of the microphone. Theoretically, in an environment with a lot of noise that is input into both sides of the microphone at the same time, the noise will be canceled.
