For SMILO SM2/SM4 is a remote control (latest model) with a sturdy black casing. Simply program the receiver or access the control panel. This remote control is not compatible with Flor& radio controllers. Security: dynamic rolling code provides high security and is non-copyable. Type: For use with receiver programming. Frequency: 433.92 MHz. Code: Rolling Code. Channels: 2 or 4 buttons. Operating distance: 10–150 m in open space. Remote Control Model: For SMILO SM2; For SMILO SM4. Receiver Models: SMXI, SMXIS, SMX2, SMX2R, OXI, OX2. Access to the receiver is required. Please ensure you have access to your receiver/opener before purchase. Due to variations between manufacturing batches, product labeling and accessory appearance may differ slightly in color and design, but functionality remains unaffected. Each remote control includes one 23A dry cell battery. Color: Black. Material: ABS. Package Contents: 4 x 433.92 MHz rolling code 2-button remote controls. Only the items listed above are included; other products are not included. Note: Lighting conditions and display settings may cause slight color variation between the image and the actual product. Measurement tolerance: ±1–3 cm.