Model No :Sennheiser RS 170 Headphone

Specifications :
Modulation : MSK Digital
Carrier frequencies : 2.4 ? 2.48 GHz
Range : approx. 80 m in the open area
Rated Input : 100-240 V, 0.2 A, 50/60 Hz

Transmitter
Audio input : 3.5 mm stereo
Audio output : RCA
Power consumption : < 0.5 W
Power supply : 5 V CC , 500 mA
Signal-to-noise ratio : 85 dBA (0,5 Vrms, 1 kHz)
Weight : approx. 228 g (without batteries)
Dimensions : 12,5 cm x 11,2 cm x 23,0 cm

Headphone
Transducer principle (Headphones) : closed, dynamic
Ear coupling : circumaural
Sound pressure level (SPL) : 110 dB
THD, total harmonic distortion : <0.5 % a 1 kHz, 100 dB SPL
Frequency response  : 18 Hz - 21000 Hz
Impedance : 32 Ω
Charging time : approx. 16 hours
Power supply : 2 NiMH-Akkus Typ AAA, 1,2 V, 600 mAh
Operating time : approx. 24 hours
Weight : approx. 228 g (without batteries)

Power supply
Rated Input : 100-240 V, 0.2 A, 50/60 Hz
Rated Output : 5 V DC, 500 mA
Operating temperature : 0 ?C to 40 ?C / 32 ?F to 104 ?F

Warranty : 6 Months Manufacturer