TOA’s WT-2100 is a Portable Receiver designed to receive 470 MHz band radio signals. An optional earphone (not supplied with the unit) is required.

“Power Source 1.5 V DC (Battery)
Receiving Frequencies 470 MHz band (5 ch) (470.075, 470.150, 470.375, 470.625, 470.725 MHz)
Receiving System Double super-heterodyne
Receiving Sensitivity 25 dB or more, Signal to Noise ratio (7 dBμVEMF input, ±1.7 kHz deviation)
Frequency Response 200 Hz – 5 kHz (Portable transmitter → Potable receiver)
150 Hz – 6 kHz (Desk-top transmitter → Potable receiver)
De-emphasis 50 μs
Output Level 4 mW (16 Ω load, 10 % distortion)
Battery Life 18 hours (alkaline)
Battery LR6 (1.5 V) × 1
Operation Temperature -10 ℃ to +40 ℃
Finish Resin, dark silver
Dimensions 62 (W) × 163.6 (H) × 32.5 (D) mm
Weight 112 g (battery included)
Accessory Neck strap x 1
* Optional earphone YP-E401 Ear-suspension ear phone.
* When using an earphone not made by TOA, use a one with a 3.5 mm-diameter plug and impedance of over 16 Ω,”””