Professional Series with rubber overmold. PTT (Push-To-Talk) and speaker combo with two audio ports with locking cams (patent pending). Audio Ports are on BOTH Top & Bottom to enable wearing the radio on either the front or the back. Contoured edges for grip and feel. OEM Option: Shadow-V Earpiece with Cam-Locking connector cable. Includes the Battery (K70BATT-1100) and Micro USB Charger (VALOR-CH) in the box at no additional charge. Alternative option: FuelPad® Multiple-Battery Rapid-Rate Charger. 3-Year Warranty. Compatible with Sonim Strike and Sonim 5560 phones. Not compatible with Sonim IS(intrinsically safe) phones.