Motorola PMLN7851A EP900W XPR7350e XPR7550e SL3500e Two Way Radio Bluetooth Earpiece Motorola PMLN7851A Bluetooth Earpiece WIRELESS Headset with in-line push to talk  The PTT Boom Mic Wireless Earpiece (PMLN7851A) features Bluetooth technology and is compatible with all portable radios. This earpiece is designed to allow you the convenience of Bluetooth technology by enabling you to wear it for long periods of time comfortably. It was designed with Push-To-Talk (PTT) functionality for business radio applications and optimized to work with Motorola Solutions two-way radios. Product Description Material: Silicone, Plastic Compatible devices DEP570E DGP5050E DGP5550E DGP8050EELITE DGP8050ELITE DGP8550E DP3000 DP3441E DP3661E DP4401E DP4601E DP4801E MTP3100 MTP3250 MTP3500 MTP3500REFRESH MTP3550 MTP3550REFRESH MTP6550 MTP6570 MTP6650 MTP6650 FUG MXP600 MXP660 SL2600 SL2K SL2M SL3500E SL4010E SL500 SL500E SL8050 SL8550 SL8550E ST7500 XIRE8600I XIRE8628I XIRP8608I XIRP8628I XIRP8668I XPR3300E XPR3550E XPR7350 XPR7350E XPR7380 XPR7380E XPR7550 XPR7550E XPR7580 XPR7580E Specifications Dimensions (inches) 2.83 H x 1.04 W x 4.23 L ( 71.88mm x 26.42mm x 107.44mm ) Earpiece Type Wireless Microphone Boom mic PTT Boom mic