[3.5mm Listen Only Surveillance Earpiece] Standard 1pin 3.5mm plug audio jacks; with electroplating anti-oxidation design to avoid the poor contact situation Soft Ear Hook design; Comfortable wearing for long time; Fit either the left or right ear Clear sound quality; Durable PU material, long service life With short cord so it won't be wrapped around inside your shirt; good resilience, long enough for your daily work Fits two-way radios (audio only), radio speaker mics, remote mics, MP3 players, and other audio accessories with 3.5mm earphone jack Works great for security, police, law enforcement or any other hearing needs in noisy enviroments We are committed to ensuring the quality of every earpieces, Provide fast customer service Note:Please confirm the Audio Jacks type your device need(3.5mm)