FM frequency: 60-108MHz, you can enjoy your favorite channels and radio stations at any time during the break. Excellent Reception:The earphones are used as the antenna. Adopting technology, the receiver is efficient to reduce noise and mit clear audios, offering an enjoyable listening experience. Preset Stations:With 5 stations preset, you can save stations that you like.You can easily use the TUN button to manually or automatically search stations.It is convenient to immediately reach and listen to the preset station you like with the number key. Lock switch:It is efficient to prevent the receiver from changing current frequency and volume with the lock switch. You don't need to worry about affecting worship or meetings. Adjustable Volume:The volume is adjustable. In a worship or a conference, you can adjust the proper volume with button to you can clearly hear the sound. Hign-concerned Chemical:None Model Number:FM Radio For Tour Guide System Type:FM Function:Clock The product appearance and printed words depending on the batch, but this does not affect use Colour: As Shown Material: ABS Package Contents: 10 x FM Receiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.