VOIP Wireless USB Phone 

   Specifications of VH2400R:

1. Modulation: FSK
2. Frequency: 2400 ~ 2483 MHz
3. Channel Number: 36
4. ID per Channel: 65530
5. Antenna Type: PIFA ANT
6. LCD Display: 128 x 64 Dot-matrix, Black/White
7. Wireless Range: Works up to 100 m outdoor, 30m indoor
8. Working Voltage: DC 3.0V ~ 4.5V
9. Battery: Three AAA Ni-MH Rechargeable Batteries
10. Tx Power: Under 10mW
11. Power Consumption:
    Communication mode 50mA
    Standby mode under 0.5mA
    Sleep mode under 100μA
12. Phone Weight: 92g with batteries
13. Phone Dimension: 116.7mm (L) x 50.3mm (W) x 25.5mm (H)
14. Operation Temp.: 0℃ (32℉) ~ 60℃ (140℉)
15. Operation Humidity: 10% ~ 85% RH
16. Storage Temp.: -10℃ (14℉) ~ 65℃ (149℉)
17. Storage Humidity: 10% ~ 95% RH
18. Battery life:Talk time-up to15 hr;
    standby time 1200 hr