cheaper item whistle keychain 1)CE&ROHS standard 2)OEM&ODM are welcome 3) ... and item color can be customized 4)Fa cheaper item whistle keychain/aluminum whistle keyring/promotional whistle1.Can be used for sport ... whistle and toy2.Item color in white,yellow,red,blue,green, ... personal alarm8.OEM&ODM order are wormly welcome cheaper item whistle keychain