Motorola HNN9044A Two-Way Radio Battery (1000mAh, 7.2V, NIMH) + FBI Earpiece with Push to Talk (PTT) Microphone Replacement For Motorola SP10, Motorola SP21, Motorola MU21CV, Motorola PRO1150 Replacement Battery & Earpiece with Push to Talk (PTT) Microphone - Compatible with Motorola SP10, Motorola SP21, Motorola MV21C, Motorola MV22CV, Motorola MU11C, Motorola MU21CV, Motorola PRO1150 Replacement for Motorola HNN9044A Two-Way Radio Batteries. Transparent coiled acoustic tube provides clear audio quality in any type of environment Lightweight flexible and skin friendly materials adds comfort for extended wear time. Low profile design for a stealth look and feel. Convenient PTT push to talk button prevents unwanted or accidental radio transmission. Capacity: 1000mAh; Upstart Battery Brand; QTY: 1 Battery, 1 Earpiece The earpiece wraps behind your ear plus the rotating lapel clip works together to give a more secure fit. On Sale for a Limited Time!