Lightweight Headphones (Pack 10) Numicon Firm Foundations Teaching Pack Set of 116 includes: Colourful

Set of 116 includes: Colourful gears

Come along as the two ducks

Small holes punched in each make them easy to hang up for display

stand or sit

Lightweight Headphones (Pack 10) Numicon Firm Foundations Teaching Pack Set of 116 includes: ColourfulSuper value lightweight stereo headphones with foam earpads and ideal for listening centres and computers. Cable length is 1. 2m. 3. 5mm nickel plated jack plug. Technical Specification: Driver Unit: 2 x 27mm Ferrite Magnet Impedance: 32 Ohms + 10% Sensitivity: 115dB S. P. L. at 1kHz + 3db USD1. 21 black housing & sponge Frequency response: 20 20kHz Max. Input Power: 15mW Available individually or in a pack of 10 or even a pack of 30